1898:GREENWICH 2nd star calalogue of

GREENWICH SECOND TEN-YEAE CATALOGUE OF 6892 STAES FOE 1890.

Appendix

O

II.

to

Greenwich Observations, 1898.

[

35

GIFT OF ASTRONOMICAL SOCIETY OP TIE PACIFIC

MEAN CORRECTIONS TO THE RIGHT ASCENSIONS OF THE CLOCK STARS, from 12-hour Groups of the 1860, 1864, 1872, 1880, and 1890 Catalogues.

(The Curvet for 1860 and 1864 are derived from a Comparison with the u-hour Groups of the 3

v

c.vs

h

4h

187* Catalogue.)

SECOND TEN-YEAR CATALOGUE OF

6892

STARS

FOR THE EPOCH

1890-0, FROM OBSERVATIONS WITH

THE TEANSIT-CIECLE MADE AT THE

~"

ROYAL OBSERVATORY, GREENWICH, UNDER THE DIRECTION OF

WILLIAM HENRY MAHONEY CHRISTIE,

C.B., M.A., F.R.S.,

ASTRONOMER ROYAL.

(Forming Appendix

II. to

the

Volume of Greenwich Observations for

the

Year 1898.)

EDINBURGH: PRINTED FOE HER MAJESTY'S STATIONERY OFFICE

BY NEILL & Co., LIMITED, BELLEVUE. And

to be purchased, either directly or through any Bookseller, from CO., 39-47 ROSE STREET, EDINBURGH, and 90 WEST NILE STREET, GLASGOW; or

JOHN MENZIES &

EYRE & SPOTTISWOODE, HODGES,

EAST HARDING STREET, FLEET STREET, E.G.; and 32 ABINGDON STREET, WESTMINSTER, S.W. ; or FIGGIS, & CO., LIMITED, 104 GRAFTON STREET, DUBLIN. 1900.

Price Six Shillings

and Sixpence,

.

ASTRONOMY

tr?

INTRODUCTION TO THE

GREENWICH SECOND TEN-YEAR CATALOGUE OF

6892 STARS, FOR THE EPOCH

1890-0.

THE

results contained in the following Catalogue are derived

from observations made

with the Transit-Circle in the years 1887 to 1896.

The year 1890 has been adopted for the epoch observations, and more convenient for reduction

mean year

as being near the

of the

to other epochs than the actual

mean

year.

The (i.)

stars contained in the Catalogue

Fundamental

Stars.

These

may

be classified as follows

include

Greenwich

Clock

:

Stars,

9

Azimuth

Nautical Almanac and other Ephemerides. stars, and Altogether, 843 stars of Professor Newcomb's Catalogue of Fundamental Stars for 1875 and the stars in the

1900 are contained in the present Catalogue. These stars have been generally well observed, especially those of the Greenwich Clock Star list, of which the number of observations (ii.)

is

usually 50 or more.

Stars contained in Groombridge's

Circumpolar Catalogue, 1810.

Of the 4243

Groombridge's Catalogue, 3645 are contained in this Catalogue, and the remainder, with-few exceptions, have been observed in the preceding Ten-Year or Ninestars

in

Year Catalogues. (iii.)

About 1500

stars,

brighter than the 7th magnitude, and beyond the limits of

N.P.D. of Groombridge's Catalogue. These include Zodiacal stars, Southern stars observed for refraction, and stars used for determination of zenith point.

With these

may

be included 340 Piazzi

(iv.)

About 700 or 800

stars.

stars,

mostly

The

faint.

positions

of these stars were

required as guiding stars for the Astrographic Equatorial, comparison stars for Comets, or stars which had been occulted

The

total

Groombridge

number

by the Moon.

of Bradley stars observed

is

stars.

701273

1817, of which

number 466

are also

GREENWICH SECOND TEN- YEAR CATALOGUE or STARS FOR Attention

is

drawn

in this Introduction to various observations

1890.

made

7

during the years 1887 to 1896, with the view of investigating the peculiarities of the instrument and the results are collected as showing to what extent the Catalogue is free from, and to what extent it may be liable to, systematic errors. chief}}

;

I.

RIGHT ASCENSIONS.

The position

determined each day by observations on the collimators, the reading of the micrometer of the north collimator for coincidence of its nearly vertical wire with that of the south collimator being Collimation Error.

of the line of collimation

is

The obtained by observations made through the central cube of the transit-circle. rmean of the observations is taken for each week, and a correction of + 008 ( = 0"'30), determined from observations made in the years 1871 to 1880, has been applied in forming the adopted reading of the line of collimation on account of the difference of the readings for coincidence of the collimators, according as they are viewed through the central cube or with the instrument raised.

The readings for coincidence of the collimators are given in the Greenwich Obser" Transits."

Once each week these observations are made both vations in the section through the central cube and with the instrument raised, the latter being marked with the letter R. The differences between these nearly simultaneous readings for coincidence, as obtained by all the observations of each observer, give the following corrections to the collimation error derived from observations through the central cube for each of the years 1887 to 1896:

Excess of Collimation Error ivhen the observation for coincidence of collimators is made with the instrument raised, over that obtained when the observation is made through the central cube.

Observer

LIBRARY OF THE ASTRONOMICAL SOCIETY OK P AC FIG INTRODUCTION.

The mean observations

of these

1871

erroneous

this

to

of

011

the

(l

tan

1880)

collimation

is

+

which has

on

the

-

0" 47, while

the

correction

(derived from

The

been applied

is

+

ascensions

is

very

right

NPD '

s>

corrections

5

0"'30.

small

effect

and

of

equals

'

2

').

(See discussions

Royal Astronomical Society,

by Professor Turner

vols. xlvi.

and

in the

Monthly Notices

lii.)

In order to eliminate personality depending on the direction of measurement, a reversion prism, eye-piece has been frequently used in determining the readings for three bisections collimation, being taken with the direction of increasing readings

apparently towards the right (r), and three towards the gives the excess of the readings r over the readings 1.

Observer

left (1).

The following

table

6

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR North

Stars.

u

1887 1888 1889

1890 1891 1892 1893

1894 1895

1896

Mean

1890.

INTRODUCTION.

Corrections

to the

values of the Level Error found about 6 p.m., deduced from the observations made about Midnight.

9h to 15 h .

Month.

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890.

Discordances in Right Ascensions of Close Circumpolar Stars, from Observations above and below Pole respectively, 1887-1896.

Polaris.

Year.

Cephei

5

1

.

Groombridge 1119.

INTRODUCTION.

ft,

.

t/j

-S

00

S

1

* I

I

f6 ^ ^ ^ ^8 3*

8

rO

^

1 1

SQ

-

^ ^ ll cs

^* ^

-I

^1 g^

IsJ

tq

s S

"-O

^^ Q co

o s

s 9

Q

3 & ^*. w ^ 10 ?'J ^ O ca

t^

1

"

i-

**i

s

A, r,

.

ft,

c^ <4

^

=C

ES

^

se

-sl 5-

^

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

10

The

Clock Error,

1890.

right ascensions of the clock stars adopted each year are given

For the years 1887 and 1888, the right ascensions of the clock stars depend on the Standard Right Ascensions of the 1872 Catalogue, for the years 1889 to 1B92, on the Standard Right Ascensions of the 1880 Catalogue, and for the years 1893 to 1896, on the right ascensions of tie 1890 in the Introductions to the

Greenwich Observations.

Five- Year Catalogue, using Struve-Peters' value of the constant of precession, and the Auwers'-Bradley proper motions.

Correction.

Equinox

Greenwich Observations,

From it

the discussions of the position of the ecliptic in the appears that the right ascensions of the Clock Stars in

the ten years 1887 to 1896 require the following corrections

:

s

1887 1888 1889 1890 1891

The mean of these

0-046

1892

+0-072 +0-024 +0-093 +0-088

1893

+

8>

+0-040 +0-090 +0-042 +0-027 +0-040

1894 1895

1896

but no correction has been applied, as the uncertainty of the system of proper motions based on Bradley's equinox, and of the observations of the Sun due to the personality of the observers, leaves the determinais

047,

somewhat

The equinox of this Catalogue, therefore, is arbitrary. that of the 1872 Catalogue carried on by the use of Struve-Peters' precessions and Auwers'-Bradley proper motions. tion of the equinox

As

in the

Nine-Year Catalogue (1872), and the Ten-Year Catalogue (1880),

a

separate determination of the right ascensions of the clock stars has been made, in which only those observations are included where the group of clock stars extended over 12 hours at least. The total number of observations of clock stars (from Six-Hour

groups)

is

12,599, and of this

number 6128

are derived from

Twelve-Hour groups.

From

these data corrections have been determined to reduce the right ascensions of the Catalogue to those of the Twelve-Hour groups taken as standard.

The following

table exhibits the excess of the R.A. from the

above that of the Catalogue

The weights

are

for each star, together with the

computed from the formula ^T^> where

m

Twelve-Hour groups

number

and n

of observations.

are the

observations in the Twelve-Hour groups and in the Catalogue respectively.

numbers of

INTRODUCTION.

Corrections to the Right Ascensions of Clock Stars in the Second Ten- Year Catalogue to

reduce them

to

1896.

Star's

Name.

to the

Standard Right Ascensions from Twelve-Hour Groups, 1887

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

12

1890.

Corrections to the Right Ascensions of Clock Stars in the Second Ten-Year Catalogue to reduce them to the Standard Right Ascensions from Twelve-Hour Groups, 1887 to

1896

Star's

Name.

cont.

INTRODUCTION.

13

Corrections to the Right Ascensions of Clock Stars in the Second Ten- Yeat Catalogue to reduce them to the Standard Right Ascensions from Twelve-Hour Groups, 1887 to

1896

Star's

Name.

corit.

14

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890.

" In the column " Adopted Correction of the above table is given a smoothed coTre-ction derived from the mean excesses for each hour.

This correction has been applied to the right ascensions of the Catalogue to obtain the Standard Right Ascensions of the

In forming these Standard Right Ascensions, no correction has been applied for the differences depending on north polar distance. Neither of these corrections has been applied to the right ascensions of the Catalogue itself. clock stars for 1890-0.

The practice of basing the right ascensions of the clock stars on the TwelveHour groups was introduced at Greenwich in the Nine-Year Catalogue for 1872. The following tables and the corresponding diagrams of the frontispiece show the effect of this process in eliminating the systematic errors of the places of clock stars derived from the earlier catalogues. The mean corrections to the right ascensions of the First

Seven-Year Catalogue (1860) and of the Second Seven-Year Catalogue (1864) are obtained from the introduction to the Nine-Year Catalogue (1872), p. 8, and to the other Catalogues from the direct comparisons with the Twelve-Hour groups given in the introduction of each Catalogue.

Mean Excess of the Right Ascensions of Twelve-Hour Groups for Hour of Right Ascension.

each

INTRODUCTION.

The Standard Right Ascensions

of the clock stars for 1890-0 based on

Twelve-Hour

groups are given on p, 64.

between the Twelve- Hour and Six-Hour groups are now so small no that they can longer with certainty be attributed to errors in the Six-Hour groups.

The

differences

An

independent verification of the accuracy of the Greenwich fundamental right ascensions is afforded by the following comparison between Newcomb's Fundamental Catalogue and the 1880 Ten-Year, 1890 Five-Year and Second Ten-Year Catalogues, the small differences in order of R.A. being entirely of an accidental character.

Standard Right Ascensions of Clock Stars of the Ten- Year Catalogue 1880, the Five- Year Catalogue 1890, and the Ten-Year Catalogue .1890, with Newcomb's Fundamental Catalogue 1900, reduced to 1890 with Struve's Precession and Auwers' Proper Motions.

Comparison of

the

(Arranged in order of K.A.)

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

16

.

II.

NORTH POLAR DISTANCES.

Microscope-Micrometer Screws.- New of them were reversed to eliminate the

steel screws effects

were applied in 1886, and three

of wear.

The

mean 1886 when the

errors

readings of the six microscope-micrometer screws, as determined in screws were new, in 1893, and in 1896 November, were as follows:

Error of the

1890.

of the

INTRODUCTION.

17

Table of new Corrections for Division Error to the Mean Reading of the Six Microscopes, and of Corrections to the Values previously adopted.

The

Pointer Reading.

corrections recur after every

60.

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

18

Nadir

Correction.

point, determined stars in the years

The apparent

1887-1896, are as follows

be

discordance between the zenith

noticed

:

1887 1888

+0-01

1892

0-12

1893

0'34

1889

+0-07 +O-08 +O-07

1894

0-27

1895

O-3I

1896

O'34

1891

may

for

from observations of the nadir and from reflexion observations of

1890

It

correction

1890.

that the object-glass

0-25

was repolished and a new telescope-

micrometer screw introduced in 1891 October.

No

correction has been applied on account of these discordances.

It

should be

observed that the adopted zenith points depend essentially on the reflexion observations of stars, and that this discordance only enters into the observations on those nights when no reflexion observations are obtained.

As

be seen in the next paragraph, there appears to be a diurnal variation in the nadir, and it was considered possible that, as the reflexion observations were usually made soon after sunset, while the observations of the nadir were made at all will

hours, such a diurnal variation ance, but

this

was not found

would

to

some extent account

for the

above discord-

to be the case.

Diurnal Variations of the Nadir. show a diurnal change in the position

Observations taken in the years 1895 to 1899 of the nadir, the observations taken about noon

and midnight giving positive corrections to the observations made near the time of The observations were grouped as in the case of the levels (see p. 6), and the sunset. results for each

month from 1895

July, from which date three observations of nadir

were taken regularly on fine days, to 1899 December, are given in the following and exhibit the apparent corrections to the nadir about the time of sunset.

tables,

INTRODUCTION.

Diurnal variations of the Nadir.

Corrections to the observations of the Nadir made about 6 p.m., deduced from the observations made about Noon.

21 h to 3 h Month.

.

19

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890.

20

R D

The following

Discordance.

observations

for

discordance

between

table gives the corrections applied to the direct the reflexion and direct observations for the

ten years 1887-1896.

1887 1888

+

0-012

1889

0-014

1890

0-013

1891

A

0-014 o-oio

+ + + + +

0-683

s i"

Z.D.

0746

sin

Z.D.

1893

0-677 sin Z.D. 0-556 sin Z.D.

1894

'536 sin

1892

1895

Z.D.

1896

-J-

+ + + +

0-062 0-057 0-057 0-065

0-056

+

+ + + +

0-576 sin Z.D. 0-703 sin Z.D.

0-546

sin

Z.D.

'4H

s i"

Z.D.

0-367 sin Z.D.

of special observations have been made to obtain information as to the A series of observations were made between 1893 December 3 cause of this discordance.

number

which the direct observation was taken immediately before the A discussion of these observations and of observation by reflexion instead of after it.

D discordance by Professor Turner and Mr Thackeray is others relating to the R

and 1894 April

22, in

The following table given in the Memoirs of the Royal Astronomical Society, vol. li. showing the results of this series of observations is taken from the Introduction to Greenwich Observations, 1894,

p. cxli.,

where the

results of the separate observations are

given.

R D

Discordance from observations in which the direct observation Results for was taken first, compared with those taken in the ordinary manner, and with the valves computed from the formula +o"'i 14+ i"'ogi sin Z.D.

Approx. N.P.D.

INTRODUCTION.

is

its

R D

Discordance deduced from observations on different nights value as deduced from observations in which the reflexion observation

Comparison of with

the

taken immediately before the direct observation,

1895-1896.

Approx.

N.P.D.

21

and with

the formula.

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

22

1890.

Value of Flexure found from observations in 1893, arranged according to

Range of Temperature.

Temperature at

the time

of observation.

INTRODUCTION. to the large in

common

number

of circumpolar observations, and the

number

of stars

it

contains

with the Cape Catalogue for 1890.

Taking the observations of Greenwich circumpolar stars first, and using the results given on p. 32, the following table exhibits the discordances in order of N.P.D. of the circumpolar observations with Bessel's and the Pulkowa refractions A comparison of columns 2 and 8 shows, on the whole, a better respectively. accordance when the Pulkowa refractions are used.

Comparison of North Polar Distances from Observations above

and below

Pole.

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

24

The

differences

1890.

between these

Catalogues for each 5 degrees of N.P.D. down to 120, and afterwards in small groups of convenient size, are given in the fourth column, using the refractions of the Tabulae Regiomontanse and colatitude 21"'90, and in the last column using the

The weights

are derived

Pulkowa

from the formula -

,

refractions

where

m

and colatitude 21 //> 7'5.

and n are the number of

observations at Greenwich and the Cape respectively.

Greenwich Ten-Year Catalogue, 1890, and Cape Catalogue, 1890, arranged in order of N.P.D.

Comparison between

the

the

25

INTRODUCTION.

To these data for the the Sun at Greenwich.

discussion of refraction should be added the observations of

The

corrections

to

the

adopted colatitude 2l"'90, using

Bessel's refractions (the values of z found in the ecliptic investigations in the

Observations), are as follows for the years 1887 to 1896 1887 1888

1889 1890

:

+0-08

1892

+0-09 +0-06

1893

0-05

1894

0-32

o-io

1895

+0-14

1896

o-oi

-

1891

The mean

o oy

of these corrections

+0-20

zero, giving a colatitude of 21

is

Greenwich

//-

90, while the

to 40 give a colatitude 2l"'92.

Had the Pulkowa refractions circumpolars from been used the colatitude derived from the observations of the Sun would have been ;

22"'14, while vol.

liii.

From

pp.

the

//> circumpolar stars would have given 21 75.

(Memoirs R. A.

S.,

159-161.)

apparent that the Pulkowa refractions, as compared with Bessel's refractions, produce greater accordance between the Greenwich circumpolar observations and, what is of very great weight, a remarkably good agreement between this discussion it is

the Greenwich and Cape observations they introduce, however, an unexplained discordance into the Sun observations.

The following table is given to enable those who :

may

wish to do

so, to

substitute the

Pulkowa

refractions in the north polar distances.

In the case of circumpolar stars, the corrections above and below pole should be combined according to the number of observations above and below pole, remarking that for observations below pole full weight is from 15 to given as far as N.P.D. 15 36* N.P.D. f weight; from 36 to 41 \ weight; and below 41 N.P.D. the observa;

tions below pole are not used.

GREENWICH SKCOKD TEN-YEAR CATALOGUE FOR

1890.

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

26

1

890.

Table of Corrections for reduction to Pulkowa Refractions and Colatitude 38 31' 2i"75.

Barometer 3O in -oo.

N.P.D.

Thermometer 5o-o F.

Argument N.P.D.

INTRODUCTION.

27

from about 3500 observations from the 1894 ledgers, supplemented by the ledgers 1887 to 1896 for low stars, together with a comparison of the values previously found by

Mr

are given in the following table, from which it appears that the later The results have been smoothed by taking observations have a smaller probable error.

Stone,

means and means again of each consecutive

pair.

Probable Error of an Observation of N.P.D.

Z.D.

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890.

28

In the following table the weight

mean

is

given in the

first

column, the corresponding

2 discordance obtained by dividing ,J

to probable error) in the second,

obtained from the table on

p.

factor for changing from

in the third

depends being given in the fourth column.

Mean Discordance Weight given bj Formula.

in

mean

column the actual mean discordance the number of stars on which the determination

and

39,

by '845 (the

N.P.D. of Observations above and below

Pole.

INTRODUCTION.

Mean

29

Newcomb's Fundamental Catalogue, 1890, and the Greenwich Second Ten- Year Catalogue, 1890, for every 5 of N. P. D. from Discordances

Q- 1-20

N.P.D.

bettveen

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

30

1890.

the relative accuracy of these Catalogues, as the accuracy of the Greenwich Catalogue may be considered nearly the same throughout.

Mean

Discordances between the Greenwich Ten- Year Catalogue, 1890, and the Astronomische Gesellschaft Catalogues, 1875.

INTRODUCTION.

Mean

Excess of R.A. and N.P.D. above Pole, arranged in Groups of One Hour of R.A.

Limit of R.A. of

Group.

31

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

32

Mean n o

a ^5

8

I"

1890.

Excess of K.A. and of N.P.D. above Pole, arranged in Groups of

1

of N.P.D.

33

INTRODUCTION.

In these comparisons of the circumpolar observations the most noticeable features in the right ascensions are the persistent negative values of the Excess of R.A. above Pole from N.P.D. 6 to the extreme limit of N.P.D. observable, and the positive value from the pole to N.P.D. 5. Possible explanations of this are Pivot error (ii.) Different (i.) character of the observation of the close polars Diurnal changes in the position of (iii.) :

;

;

the instrument.

The discordances

in N.P.D. for the groups of

1

indicate that the systematic errors

which residual division errors are included) are very small, the mean value of the discordance (taken without regard to sign) for the groups from the pole to N.P.D. 30 being zt 0"'105, from which it results that the probable value of the systematic (in

error for a zone of

1

The mean value

of

N.P.D.

of the

it 0"-06

discordances

(taken without .regard to sign) for groups of 1

is

in

N.P.D.

for

groups of

1

hour of R.A.

O'^IW, which is somewhat larger than the value of N.P.D., though the weights and numbers of the stars are much is

larger for the R.A. groups.

GREENWICH SECOND TEN- YEAR CATALOQUE FOR

1890.

34

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

Circumpolar Stars.

No.

Star's

1890.

Excess of R.A. above Pole, arranged in order of R.A.

INTRODUCTION.

Circumpolar Stars.

d fc

m

I TO

Excess of R.A. above Pole, arranged in order of R.A.

35

continued.

36

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

Circumpolar Stars.

No.

Star's

1890.

Excess of R.A. above Pole, arranged in oi'der of R.A.

continued.

INTRODUCTION.

Circumpolar Stars.

o to 00

-

i CO

Excess of R.A. above Pole, arranged in order of R.A.

37

continued.

3.8

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

Circumpolar Stars.

No.

Star's

1890.

Excess of R.A. above Pole, arranged in order of R.A.

concluded.

INTRODUCTION.

Circumpolar Stars.

d to

!

03

Excess of N.P.D. above Pole, arranged in order ofN.P.D.

39

40

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

Circumpolar Stars.

No.

Star's

1890.

Excess of N.P.D. above Pole, arranged in order of N.P.D.

continued.

I

41

INTRODUCTION.

Circumpolar Stars.

No.

Star's

Excess of N.P.D. above Pole, arranged in order of N.P.D.

continued.

GREENWICH SECOND TEN- YEAH CATALOGUE OF STARS FOR

,42

Circumpolar Stars.

d "

1890.

Excess of N.PJ). above Pale, arranged in order of N. P.D.

continued.

INTRODUCTION.

Circumpolar Stars.

fir;

JK

Excess of N.P.D. above Pole, arranged in order of N^P.D.

continued.

44

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

Circumpolar Stars.

1890.

Excess of N.P.D. above Pole, arranged in order of N.P.D.

concluded.

INTRODUCTION.

Comparisons of the Right Ascensions within the limits of N.P.D. 50- 120, arranged in order of R.A. Catalogue...,.

45

46

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890.

Comparisons of the North Polar Distances, arranged in order o Catalogue

INTRODUCTION.

Comparisons of the Right Ascensions of the Astronomische Gesellschafi Catalogues.

Catalogue.

Limit of

N.P.D.

.

47

48

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890.

ib ci

cc

^ O HH H O S OS

w PH O g

g9

INTRODUCTION.

49

50

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890.

INTRODUCTION.

51

52

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890.

INTRODUCTION.

53

GREENWICH SECOND TEN- YEAR CATALOGUE OP STARS FOR

1890.

INTRODUCTION.

55

56

GREENWICH SECOND TEN- YEAR CATALOGUE OP STARS FOR 1890.

INTRODUCTION.

p pj

*

57

58

GREENWICH SECOND TEX- YEAR CATALOGUE OF STARS FOR

1890.

INTRODUCTION.

59

60

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR

1890.

INTRODUCTION. VII.

The

right ascensions

BINARY STARS.

and north polar distances

for each year's observations

reduced

to 1890'0, together with the fraction of the year and the number of observations, are n Cassiopeiee given separately for the following stars, on account of their orbital motion :

and Comes,

Ursas Majoris and Comes. for the value of proper motion given in the Catalogue.

Observed a

Sirius,

Procyon, and

Mean Annual

Results reduced

Canis Minoris, and

Xo- 253,

to

1

890 x> of

>}

The

results are corrected

Cassiopeia}, a Canis Majoris,

Ursce Majoris, corrected/or

Proper Motion,

GREENWICH SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890.

62

EXPLANATION OF THE SEPARATE COLUMNS OF THE

YIIL

PRINTED CATALOGUE. The No.

is

the ordinal

number

of this Catalogue for the stars arranged in order

of Right Ascension.

Columns 2 and

two other Catalogues of

3 contain references to

stars, viz.,

Auwers'

and the Groombridge Catalogue, 1810. The star's name is taken from one of the authorities given on the back of the title-page facing the Catalogue, edition of Bradley

the order of preference being the order of mention of the authority.

The magnitudes

from the following sources in the order given the Harvard Photometry (marked *) the Catalogues of the Astronomische Gesellschaft or the Bonn Durchmusterung (unmarked) Struve's Stellarum Duplicium Mensurse are taken

:

;

;

Micrometricss for double stars (marked t) the Uranometria Argentina, the Southern Meridian Photometry (Harvard), the Argentine General Catalogue, 1875, and the Cape Catalogue for 1890, and for a few stars from other authorities (marked j), the ;

In the case of variable stars, the limits authority in each case being given in the notes. of magnitude and the period given in the notes are taken from Mr Chandler's Third

The Catalogue of Variable Stars (Tlie Astronomical Journal, vol. xvi. No. 379). of double stars the usual designations in double star catalogues are given in the notes for double or multiple stars, whether separated or not in the Transit-Circle.

names

The Mean R.A. 1890'0 has been found by combining the Annual Catalogues of Greenwich Observations from 1887 to 1896.

The Mean Date

results

given in the

expressed in years and decimals of a year reckoned from 1800.

is

The Number of Observations gives the aggregate number of all the observations in the different years above and below the pole respectively, which are combined with equal weights to form the mean right ascension.

The "Annual Precession 1890'0" and the "Secular Variation 1890'0" have been computed by the help of Folie's Douze Tables pour le Calcul des Reductions stellaires, in

which Struve's constant of precession

by

the formula, S

3

-0725

-f-

i"-3369 [log.

=

is

used.

The precession

0-12611] sin R.A. cot N.P.D.

and the secular variation by the formula, A + B cot N.P.IX

+

C

cot 8 N.P.D.,

;

in R.A.

is

given,

INTRODUCTION.

63

where

A= B

c^'ooigo

=*

+

o s< oo65o sin

s

o -ooo57 sin E.A.

C = +o

s

-oi3OO sin 2

The second term of the precession

is

+

2

E.A.

o^ozgSy

cos

E.A.

E.A.

computed from these tables, aud the These formulae every minute of R.A.

readily

quantities, A, B, C, are therein tabulated for

correspond essentially with those used in previous Catalogues.

The R.A. and N.P.D. have been taken for 1890'0 to 1 s and calculations were made in duplicate and carefully compared.

The Annual Proper Motions

To the columns

2"'0 respectively.

The

are taken from the authorities given on p. 48.

same remarks apply generally as in the case of R. A., except that, in combining observations above and below the pole, the following For stars whose N.P.D. does not exceed 15, the observations above weights are used. and below pole have equal weights. From N.P.D. 15 to N.P.D. 36, those below pole relating to N.P.D., the

have the weight f for each observation from N.P.D. 36 to N.P.D. 41, those below pole have the weight ^ for each observation beyond 41 N.P.D., the observations below ;

;

pole are not used in forming the

Mean N.P.D.

The "Annual Precession 1890'0"and the computed is

1890'0. "

Secular Variation 1890'0" have been

as explained in the case of the Right Ascensions.

The

precession in N.P.D.

given by the formula, 2o"-o542 cos E.A.,

which

is

taken directly from the tables

;

A + 1

and the secular variation by the formula, Bi cot N.P.D.,

where

A = B = The

quantities

A

1

1

+o"-oo86

cos

1

+o"- 1 950

sin 2

and B 1

R.A. +o"'448o E.A.

sin

E.A.

are given directly in the tables for every

minute of R.A.

GREENWICH SECOND TEN- YEAR CATALOGUE OF STARS FOR

64

Standard Mean Right Ascensions of Clock- Stars for based on Twelve-Hour Groups.

Star's

Name.

1890.

COMPLETE LIST OF THE

EERATA THE GEEENWICH CATALOGUES FKOM

IN

Si: Greenwich Six-Year Catalogue of Stars for 184.0

Greenwich Six-Year Catalogue of Stars f01- 1840.

PAGE

2.

Seconds of Mean R.A. 1840 Jan. i, for 40^87, read 8 8 4o 73 Annual Precession R.A. /or -}~3 'iz4, read Seconds of Mean N.P.D. 1840 Jan. i, 4-38-076 for 58" -62, read 58"'68. ;

,

;

63.

Seconds of Mean N.P.D. 1840 Jan.

for 46"'4S, read

i,

5 6"- 4 8.

Annual Precession

139.

No.

139.

in R.A.., for

+3 S '379>

read

+3 s 'o64.

in Bessel's Bradley, insert 328.

,

;

21

read 33.

.,

20'.

53"'g8

Annual Precession

;

140.

i6"-Xz 7 N.P.D., insert Mean Year for N.P.D., dele No. of Obs. in N.P.D., dele; Mean N.P.D. 1840 Jan. i, for 33. 20'. 53" '98, read 33. 21'.

Annual Precession in N.P.D., dele.

174.

Seconds of Mean

in

.

;

IJ.A.

1840 Jan.

for 55 8- 32, read

i,

558-23.

181.

Flamsteed's Number, &c., for 56 Arietis...

read 58

Arietis...^.

192.

Flamsteed's Number,

Inc.,

for 33

read 37

Persei...i|i,

Persei...^.

252.

17

298.

Flamsteed's Number, &r., for 76 Tauri...i, read 97 Tanri...t; Mean N.P.D. 1840 Jan. i, for 71. 36'.

2i "'46, read 71. 26'. 2i"'46.

Mean R.A. 1840 h 5

312.

i6

18

318.

17

320.

.

40"". (o

Jan.

i,

far

5

h.

44

m

(o

.

8 ),

read

8 ).

Seconds of Mean N.P.D. 1840 Jan. "

i

,

for

2,6" 37 ,

read

No. in Baily's Flamsteed, for 665, read 865.

Dele the observation and numbers.

19

321.

19

330.

Mean Year for R.A.,/or 1839, read 1838 Seconds of Mean R.A. 1840 Jan. i,for i4 8- io, read i7 8 '4i.

Seconds of Mean N.P.D. 1840 Jan. i for z^" 'go, read

331.

27" -24.

Dele the observations and numbers.

&

19

;

,

No. of Obs. in N.P.D., for i, read 3 Mean N.P.D. 1840 Jan. i, for 59. 57'. 27" '09, read 59 58'. 9"'7i.

355. Flamsteed's Number, &c., insert 49 Aurigie Baily's Flamstted, insert 915 Bessel's Bradley, insert 959 Piazzi, insert VI. 146 Taylor, insert 2543 Mean h R.A., 1840 Jan. i, insert. 6 25. (io 8 ) Mean Year for N.P.D., insert 1838; No. of Obs. in N.P.D., insert Mean N.P.D. 1840 Jan. i, insert 5 61. 51'. 36"'io Annual Precession in N.P.D.,

19

332.

;

.

18

;

;

;

;

;

.

;

;

;

insert

20

&

21

378.

in

Groombridge's Catalogue, insert 1259. for N.P.D., for 1841, read 1839 No. of Obs. in N.P.D., for i, read 3 Seconds of Mean N.P.D. 1840 Jan. i, for 40" '62, read 4i"'i3.

Mean R.A. 1840 Jan. i, for 7 h 2 m i48- 2o, read

Mean Year

;

;

.

h

.

i

m

.

+2" '197.

DcJe the observations and number?.

GREENWICH SECOND TEX-YKAR CATALOGUE FOR

1890.

.

8 i4 '2o.

Dele the observation and numbers.

Mean Year

No. in Bessel's Bradley, dele the number.

Mean Year for N.P.D. insert 1840; No. of Obs. in N.P.D., insert 8 Mean N.P.D. 1840 Jan. i, for

33.

No.

7

103.

140.

&

continued.

NO.

3

16

1840.

for R.A., insert 1836; No. of Obs. in Seconds of R.A. 1840 Jan. i,for R.A., insert z s 8 (4o ), read 4i '56 ; Annual Precession in R.A., ;

insert

ERRATA.

66 Greenwich Six-Year Catalogue of Stars for 1840 PAGE.

NO.

continued. [

Greenwich Twelte-Year Catalogue of Stars fur 1845

contd.

ERRATA. Greenwich .Twelve-Year Catalogue of Stars for 184.5

(cxxxvi)

1389.

Secular

1434.

+"'475Star's Name,

(cxxxviii) 1443.

1472.

(cxli)

1507.

(cxlii)

Variation

Value of

I,

N.P.D. for

in

read

o"'475,

,

-..

Seconds of Mean N.P.D. read 41" -99.

1840 Jan.

Mean R.A.

h for i6

1840 Jan.

for 36""99,

i,

i,

27

.

m

.

(o

s

1562.

+08-0115.

Reference Number to Pond, for 773, read 774.

Variation

in

read

),

(cxlv)

Secondsof Mean N.P.D. 1850 Jan. i,for 44"'S5, read

(Ixv)

664.

Secular Variation of Precession

(Ixxii)

786.

Star's

and 1633. Magnitude of and 7 respectively.

in

N.P.D., insert

(cliv)

1739.

972.

(Ixxxvi)

1048.

(clvii)

1784.

Log. /, for 0-06159, read 0-09612 I37"'52i, read I35"'i36.

(clviii)

1809.

Log. g, for 1-44209, read 1-44309; Value of

288-69.

1062.

(xciv) ;

Value of

V,

I,

for

878-092, read 878-015. g, for 1-44208, read 1-44308; Value of 878-084, read 878-007.

.

,

+

I,

for

Variation of Precession in .N.P.D., o"*475, raid +o" -475.

Secular

(e)

1294.

Value of

I',

(oii)

1316.

Value of

I,

:

for I35"*i36, read i^f'^zi. for 868-573, read 868-636.

Reference to footnote, for 1404,

(cviii)

fer

" These stars are designated in the B.A.G. as 7- Sagittarii and -f Sagittarii."

_Add Footnote

and

for

1172.

Log.

1

Name, for 31 Bobtis...^ read 51 Bobtis.../* Seconds of Mean R.A. 1850 Jan. i,for 368-59, read 388-16; Annual Precession in R.A., /or 38-546, read +38-022 No. in Greenwich Twelve-Year ;

/or 293-56, read

i,

1

Star's

Catalogxie, dele 1363.

(Ixxxviii)

Seconds of Mean R.A. 1845 Jan.

z Corvi...-y, read 2 Corvi....

Name, for

Reference to footnote, for 89, read 889.

(Ixxxiii)

star, insert 8-9, 8-9,

1631, 1632,

1407,

1408,

read

1407, for

1608,

read

1404, 1407.

g, for 1-44209, read 1-44309; Value oil, for s 878-080, read 87 'oo3.

Log.

(clx)

1831.

Value of

(clxv)

1911.

(clxv)

1918.

(clxviii)

1979.

Mean N.P.D. 1845 Jan. i, for 75. o'., read 74- 55'Mean N.P.D. 1840 Jan. i,for 33. n'. 7"-z8, read 33. 12'. 7 "-28.

Delf- Mean R.A. 1840 Jan. i, Mean Year, and No.

I,

Dele the footnote.

Reference to footnote, for 850, read 847.

(Ixxviii)

read

R.A., for +08-0015,

(exlviii)

1811.

NO. 600.

(Ixxvi)

Secular

(clviii)

PAGE.

for 843-495, read 888-495.

'535-

1810.

contd.

(Ixii)

54" '8 5. dele

(cxlii)

(clviii)

Greenwich Six- Year Catalogue of Stars. for 18,50

contd.

NO.

PAGl".

(cxxxv)

67

Last column, No. following

(eix)

1408.

for 868-573, read 868-637.

Greenwich Seven- Year Catalogue of Stars for 1860.

of Obs.

1982.

Mean R.A. 1840

Insert

Mean (clxxiv)

2094.

Star's .

',

Jan.

22 h

i,

2

.

m

Introduction.

Line 8, for e, read e l ; line 9, for i -2 -f- cos R. A. cos N. P. D. read i '2 cos R. A. cos N.P.D.

{xiii} .

158*17

;

and No. of Obs., 2.

Year, 1840 hi serf.

Piazzi XXIII. 48. Logarithms of Name, g, h. iiii'l the value of/, for the numbers given

,

;

0*10409 (clxxv)

2094.

]

Mean N.P.D.

0*07372

1*44640

|

1845 Jan.

Logarithms of

e',

f,

i,

|

0*08908

g', h',

j

848*368

read 67. i'.; and the value of I', for

for 67.

15.

Insert Footnote

{xvii}

40.

Secular Variation of Precession in N.P.D., insert

{xviii}

45.

Mean N.P.D. 1860 Jan. 34. 14' Mean Year

(clxxviii)

2148.

;

9-85715 9-91246 0-73041 9-99717 I4o"*283 Seconds of Mean R.A. 1845 J an '> for 258-88, read 258-79; Log. g, for 1-44607, read 1*44762; Value of Iffor 808*793, read 808-673. |

:

+o"-o68.

6'.,

the numbers given substitute

" The magnitude has been taken from the Greenwich Observations."

{xvi}

substitute

|

i,

for

for

34.

5i"-26, read

13'.

N.P.D., dele

;

No. of

Obs. in N.P.D., dele.

|

-

{xviii}

46.

Seconds of Mean N.P.D. 1860 Jan. i, for 5i"'95, read 5i"'92 No. of Obs. in N.P.D., for 33, read 34. ;

{xx}

96.

Annual Precession

in

R.A., for +38-125,

of

Precession

read

+3 S> "7. {xxii}

148.

Variation

Secular

+08-0189, read

Greenwich Sij'-Year Catalogue of Stars for 1850. (xxxvi)

151.

(xxxviii) (xliv)

288.

Annual Proper Motion

390.

3

in

R.A.,/o?"+o

s

482.

Log h,for 0*07739, read 0*07839.

848-232, read 848*164.

3

i,

for 35"'O7,

i,

for 2i"'Z7,

8" -07.

191.

Seconds of Mean N.P.D. 1860 Jan. read 26"'S3.

\xxiv}

196.

Mean N.P.D.

1860 Jan.

i,

for 37.

3'.

42"76, read

37 .*'. 41" -76. i,

for 338-41, read

308-41. (liv)

R.A., for

Seconds of Mean N.P.D. 1860 Jan.

{xxiv} read

-o88,

'oo8.

Seconds of Mean R.A. 1850 Jan.

188.

read

Log e',for 0-92829, read 9-92829.

Reference to footnote, for 204, read 205.

+o (1)

{xxiv}

in

+o stoi79.

Value of

I,

for

{xxxi}

295.

{xxx}

303.

/, for '85587, read 9-85587.

Mean R.A. 1860 Jan. i,for 4''. 5.

Log.

4 h.

ftm.

,8- 04 .

578-24, read

ERRATA.

68 Greenwich Seven-Year Catalogue of Stars for 1860 PACE.

NO.

{xxxii}

328.

MeanN.P.D. i86ojan.

343.

Seconds of Mean R.A. 1860 Jan. i,for

{xxxii}

i,

coutd.

for 12.1.}'., readizo 8 8 '94,

.

3'.

{xxxii}

{xxxii}

347.

348.

in

Variation of Precession read -|-o 8 'oioo.

in

Secular

504.

Proper Motion in R. A., for

{xliv}

569.

Star's

577.

Insert Footnote:

Piazzi

Name, for

+o s 'oo3, VII.

R.A.,

for

read

08-003.

Canis Minoris

and {xliv}

591.

1127.

Star'sName, for Piazzi XIII. 299, read Piazzi XIII.

{ixxii}

i39-

Star's

{ixxvi}

1237.

Log. f,for 0-08712, read 0-05712.

{ixxxviii}

1461.

Log.

{xc}

149.

Magnitude, for

{xc}

'494-

Secular Variation o s- 4454, read

{xc;

1516.

Seconds of Mean R. A. 1860 Jan. i,for 5i s '6i, read

306.

"This

star is the Variable S. the limits of variability are 7-5

;

13, the period 335

Name, for

Star's

{ixxii}

read Piazzi

267,

VII. 67. {xliv}

NO.

52 {xciii}

days."

593.

No. in Strove,

{xlvi}

60 1.

Insert

Piazzi VII. 755, read Piazzi VII.

{xlvi}

{xlvi}

{1}

{lii}

{liv}

U 607.

622.

694.

733.

780.

dele 918.

Footnote:

{xciv}

{xcvi}

"This

star

is

Geminorum."

1570.

Variation c^'oisS, read

Precession o s 'oi88.

in

of

Mean N.P.D. 1860 Jan. i, for 37. 49'., read 37. 5'Mean N.P.D. 1860 Jan. i, for 52. 57'., read 52. 58'.

Seconds of Mean R.A. 1860 Jan. i, /or 488-98, read

Log. /, for 9-80394, read 9-80217 for 86"-8o6, read 86"-87i.

i,

;

forzS"'oo,

Value of

No. in Lalande (B.A.),/or 21898, read 21899.

Star's

{ixii}

949.

Magnitude,

{ixii}

957.

Secular

{ixiv}

975.

Proper Motion in R.A., insert

975.

Proper Motion in N.P.D.,

dele.

I',

in

R.A.,

Groom-

Name, for

5 Sagittse,

in

read 15 Sagittse.

8

3 '334,

read

for +38-238,

read

R.A., fur

Footnote, del:

{civ}

1762.

Magnitude, dele

{civ}

1772.

Annual Precession

;

in

R. A.

,

+38-231. {cix}

1844.

The numbers Piazzi's,

in the

columns referring

Groombridge's, and Pond

to Bradley's,

s

Catalogues,

belong to No. 1845.

+o s- o48.

{ex}

1885.

Proper Motion in R.A., insert

{cxi}

1885.

Proper Motion in N.P.D., insert

{cxv}

1963-

Value of

{cxiv}

1971-

Proper Motion in R. A., insert

/',/<

i3i"'859,

{cxv}

1971.

Proper Motion in N.P.D.

VXvi}

2003.

Seconds

of

rvjorf

,

-

o" o5.

i3i"'589.

+o 8- o84. o"'oi.

insert

Mean R. A. 1860

Jan.

i,

3 for 3O 77, read

for

o s 'i52.

Greenwich Seven- Year Catalogue of Stars for 1864.

o" -07.

insert

{xii}

6-3,

read

7.

No.

in Lalande, insert

{xii}

27.

No.

in Lalande, insert 459 (B.A.).

{xv}

45.

No. in Bessel's Bradley, for

{xvi}

93.

No.

{xix}

123.

No.

145.

Annual Precession

{xii}

Name, for Piazzi XIII.

221, read Piazzi XIII.

Piazzi XIII. 228, read Piazzi XIII.

Log. g',for 1-63220, read 1-63127 8 4" '675, read Zj'-jjj.

;

Value of

I'

Jor

No. in Lalande,/or 127, read 125.

26.

6-5.

263. jlxxiii}

2894, read

Name, for Groombridge

Footnote, dele.

228.

1122.

for

308-29.

Low. h,for 0-08591, read 0-08501.

Name,/or

R.A.,

Piazzi XI. 247, read Piazzi XI. 207.

Variation of Precession 8 08-0076, read -(-o 'oi4i.

Star's

in

biidge 2984.

R.A., for

943.

1118.

and the

+3 8 '334-

Secular

Star's

g', h',

Precession

1665.

Magnitude, for

for

08-0017.

{xcviii}

904.

{ixx}

Star's

of

267, read 277.

{ixii}

1117.

1625.

Variation 4-08-0017, read

Secular

Ammiil Precession

{ixi}

{ixx}

f,

Log. e',for 9-09029, read 0-09029.

Seconds of Mean N.P.D. 1860 Jan. read z^"yj.

1097.

R.A.,

4 6.

Star's

Name, for

in

'

1635.

819.

{ixx}

8 "9.

of Precession o s "8454.

1627.

{ivi}

1078.

read

{xcvi}

Log. e',for 9-99786, read 9-97786.

{ixviii}

6,

{xcvii}

780.

{ixr}

8

for 9-12659, read 0-12659.

Name, for Piazzi VII. 267, read Piazzi VII. Column "Hour and No. in Piazzi," for 277.

Star's

{lv}

848.

e',

1538. \ Transpose the logarithms of e', value of/' for these two stars.

539- /

the variable

438-12.

{lix}

read Piazzi

52.

1

'55-

{xlv}

XIV.

Piazzi

Name, for XIV. 22.

R.A., for

+o8 'oo25, {xl}

contd.

PAGE

read

98-51.

Secular Variation of Precession +o s 'oo44, read -|-O 8 'OO76.

Greenwich Seven- Year Catalogue of Stars for 1860

{xviii}

in Bessel's

-

3

33,

).

read 39.

Lalande, insert 1299 (B.A.).

in

+

427 (B. A.

3 22.

Bradley, insert 116. in

R.A., for

+3 S> 222,

read

ERRATA Greenwich Seven-Year Catalogue of Stars for 1864

contd.

PAGE.

No. iu Bessel's Bradley, Star's

insert 148.

Name, for 64 Andromeda

1

... |,

read 46 Andro-

69

70

ERRATA. Greenmi'li

71

ERRATA. Greenwich Ten- Tear Catalogue of Stars for

1

Greenwich Ten-Year Catalogue of Stars for 1880

8 80.

PAGE. NO.

PAGE.

Mean

6

23 18

33.

25

870.

27

1231.

32

1963.

41

3563.

44

3915.

Corrections to Right Ascension, &c., Limit of R.A. h to h S 24 , for +8-014, read 'oi3.

+

Mean N.P.D.

iSSo'o, for 58"-68, read 58"'8o.

Excess of N. P. D. above Pole, for +o"'47, read -\-o"'$g.

Mean N.P.D. i88o'o,/or $2"'/n, read $2"'<)i.

Excess of N.P.D. above Pole, for o"'26, read o"'j^.

45"'49, read 4$"'jo.

Excess of N.P.D. above Pole, for +o""85, read -|-o"'64.

Mean N.P.D. i88o'o,/or o"'2S, read o"'4O. Excess of N.P.D. above Pole, for +o"'i7, read +o"'o5.

Mean N.P.D.

46

1231.

Excess of N.P.D. above Pole, for +o"'85, read +o"-64.

47

33.

Excess of N.P.D. above Pole, for +o""47, read +o""59.

47

870.

47

iSSo'o, for i4""33, read n"'2,j.

Excess of N.P.D. above Pole, for o"'o9, read

o"'73-

3979.

Excess of N.P.D. above Pole, for

o"'o9, read

o"'i5.

48

1963.

Excess of N.P.D. above Pole, for -\-o"'ij, read +o"'c>5.

48

3915.

Excess of N.P.D. above Pole, for

51

3563.

Excess of N.P.D. above Pole, for

{iii}

{iii}

33.

39.

No. of Obs. in N.P.D. below Pole, for

{xi}

331.

Seconds of

{xii}

378.

Star's

o"'49, read

1

{iv}

78.

80.

read

(2).

Name./orW.B.

(2) II.

581, raid Piazzi II.

read 33.

No. of Obs. in R.A.,/or

{xiii}

418.

{xiii}

422.

Star's

442.

3,

Name, for W.B.

1016, read

(2) II.

Star's

Groom-

220 (ist Star), read Piazzi

for Piazzi II.

Name,

{xiv}

443.

Star's Name, for Piazzi II. Piazzi II. 222.

{xiv}

445.

Star's

Name, for W.B.

(z) II.

220 (2nd Star),

read

1223, read Piazzi II.

223.

448.

Seconds of Mean N.P.D. i88o'o, for 47""74, read 47"- 7 8.

456.

Seconds of Mean R.A.

o"'33.

{xiv}

R.A. 1880-0, for +08-0775,

Annual

278-428.

.

474.

Mean R.A.

Seconds of

1880-0, for 268-882, read in R.A., for

Precession

read +28-5659.

9,

{xiv}

1

8 80 -o,

sfor 23 6i5^ read

238-281.

{rvii}

591.

Seconds of Mean N.P.D. 1880-0, for &"'<)S, read

595.

Secular Variation in N.P.D. iSSo'o./or +o"'276,

+o s 'o6i9.

5 Z "'97-

Seconds of Mean N.P.D. 1880-0, for 58"'42, read Seconds of Mean N.P.D. iSSo'o, for

T.-J"^\,

read

{xvii}

read

-

297.

{xix}

Seconds of Mean N.P.D. i88o'o,/or 3i"'49> read

{xx}

684.

Seconds of Mean N.P.D. i88o-o,/or24"-84, read

3'"'53-

Name, for Groombridge 96, read Piazzi 0, 114 Seconds of Mean N.P.D. 1880-0, for 29"-8o, read 29""83.

Star's

+o"

661.

2 7 "'5I.

{iv}

2,

8 58 -8z7, read

Seconds of Mean N.P.D. i88o'o, for 9"'6i, read

.

Secular Variation in

1880-0, for

408.

;

.

Mean R.A.

II. 220.

Clock-Stars, &c.

Piscium, Assumed Mean R.A. i88o'o, h m 88-938, read 23 h 53. 88-947. for 23 53

read

319.

{xiv}

Assumed Mean Name, 5 Argus, read p Argus R.A. 1880-0, for 8h. z". 268-981, read 8 h 2 m 258-981.

i.

{x}

+o"73, read +o"'46.

.

{iii}

Seconds of Mean N.P.D. 1880-0, for 58"'37, read

io"'o4.

o"'i5.

o"'26, read

.

301.

bridge 566.

Excess of N.P.D. above Pole, fur

57

{x}

{xiii}

3979.

56

Seconds of Mean N.P.D. i88o'o,/o?- 24"'oo, read 23"- 9 4.

105.

o"'33.

44

for

300.

588-527.

Mean N.P.D. i88o'o,/or 59"76, read 6o"-c>3.

Excess of N.P.D. above Po]e,/or +o"73, read +o"'46.

Star's

{x}

58"-2o.

Mean N.P.D. i88o'o,/or

Mean N.P.D. i88o'o, for 2i"'84, read zi"'68.

Excess of N.P.D. above Pole, for "'4<), read

contd.

NO.

24"- 9 i.

;

{xxii}

775.

Seconds of Mean N.P.D. i88o-o,/or ij"'oi, read 1 7" -05.

{xxiii}

826.

Seconds of Mean N.P.D. i88o-o,/r 4z"'zi, read

{xxiv}

870.

Seconds of Mean N.P.D. 1880 'o, for 52"'4Z, read

899.

Seconds of

Seconds of Mean N.P.D. iSSo'o, for 34" -09, read 34"-i2.

4 z"-24. {vii}

180.

Seconds of Mean N.P.D. i88o'o,/or 39""63, read

5 2"-8 5 .

Seconds of Mean N.P.D. iSSo'o, /or zo" 56, read -

{vii}

190.

{xxv}

Mean N.P.D.

i88o'o, for 8"'93, read

8"'96.

{vii}

193.

Seconds of

Mean N.P.D.

1880-0, for ii"'82, read

{viii}

213.

Seconds of

Mean N.P.D.

1880-0, for 49"'o8, read

{viii}

219.

Mean N.P.D. 1880-0, for 71.

71. 27'. io"-i4.

{viii}

222.

Annual Precession

in

26'.

io"'i4, read

R.A., for +38-5298, read

+38-5288.

{x}

297.

Seconds of Mean N.P.D. 1880-0, for 48""32, read 4 8"'4o.

{xxvi}

922.

Seconds of Mean N.P.D. 1880-0, for I3"'34, read

{xxvii}

967.

Seconds of Mean N.P.D. i88o'o, far 2i"'78, read

{xxviii}

1037.

{xxxii}

1169.

Seconds of Mean N.P.D. i88o'o, for 7"'66, read 7" 7 1.

Seconds of Mean R.A. 1880-0, for 518-546, read 518-516; Seconds of Mean N.P.D. 1880-0, for are due to iz"'33, read iz"'37. These corrections orbital motion of Sirius, as computed from Auwers' elements (Pub. der Astron. Gesellsch., No. VII.).

72

ERRATA.

Ureenurich'JTen-Year Catalogue of Stars for 1880 PAGE.

NO.

{xxxii}

1172.

contd.

Greenwich Ten-Year Catalogue of Stars for 1880 PACK.

contd.

NO.

Seconds of Mean N.P.D. i88o'o, for 3o"7o, read 3"'75-

{hi} {liii}

2003.

Seconds of Mean N.P.D. i88o'o, for 37"7o, read

{liii}

2005.

Seconds of Mean N.P.D. i88o'o, for 2i"'58, read

1318, read Piazzi

{liii}

2008.

Mean N.P.D. iSSo'o. for 68.

68. 6'. 8"- 4 2.

Footnote, for The magnitudes given in B.D. are 8 '6 and i 7, read The magnitudes given in Struve's Mensural Micrometrico} are 2-7 and 3-7.

{liii}

2023.

Seconds of Mean N.P.D., i88o'o,/or 33"'85, read

{Hv}

2061.

Seconds of Mean R.A., for if'ijj, read 9 S '977 Seconds of Mean N.P.D. i88o'o, for 48"'i4, read 48"-j8.

{liv}

2064.

Seconds of Mean N.P.D. i88o'o, for 3 6" -30.

{lv}

2102.

Seconds of Mean N.P.D. i88o'o, for 43"'23, read

{lv}

2103.

Seconds of

{xxxiii}

1231.

Seconds of Mean N.P.D. i88o'o, for 45"'94, read

{xxxiii}

1237.

Dele observation in N.P.D.

{xxxiv}

1278.

Star's

1963.

Seconds of Mean N.P.D.

i88o'o, for o"-tf, read

"'43-

37"'5S-

1280.

{xxxiv}

Star's

2i"- 43

Piazzi VI. 97, read Piazzi VII. 97.

Name, for

Name, for Groombridge

VII. 92.

{xxxv}

g

'

I -!

*'' (,

{xxxv}

1311.

Seconds I 3

{xxxv}

1313.

{xxxvi}

1358.

Mean N.P.D.

of

"-2 7

Seconds of Mean N.P.D. 1880-0, for 9"'5o, read

{xxxviii}

1409.

Seconds of Mean N.P.D. 1880-0, for 43"'84, read

9"'59-

44"'M{xxxix}

1448.

Seconds of Mean N.P.D. i88o'o, for io"'i8, read

{xxxix}

1471.

Seconds of Mean N.P.D. 1880-0, for i3"'33, read

{xl}

1513.

Seconds of Mean N.P.D. i88o'o, for 38"'i7, read 3 8"- 4 6.

io"'44.

{xli}

1559.

1575.

Seconds of Mean N.P.D. 1880-0, for 58"'28, read

{xlii}

'598.

Animal Precession

{xliii}

1602.

Secular

5 8 "'44-

Variation

in

R.A., for

08-0040,

2134.

Seconds of Mean N.P.D. i88o'o, for 46"'42, read

{Ivi}

2154.

Annual Precession

Star's

1627.

Seconds of Mean R.A.

1768.

Star's

Name, for

{xlvii}

|

1773.

i

R. A.

oh. 59x1.

1880-0, (

for

io h .

59"!.

(28

s ),

1815.

Star's

Name, for

{xlviii}

1840.

Star's

Name, for

1861.

read

in

R.A., for

+o

read

2171.

Annual Precession

{ivii}

2184.

Seconds of Mean N.P.D. i88o'o, for 46"'34, read

2192.

Seconds of Mean N.P.D. i88o'o, /or 24"'28, read "'

1253-

Secular Variation in R.A., for

s

'2999,

4 6 "'39{ivii}

24

3 8.

+o s-oo83,

read

+08-0183.

Secular Variation in R.A.,

2284.

o s 'oo74, read

for

-f- 08-0074.

{ixiii}

2403.

Seconds of Mean N.P.D i88o'o, for ^"-79, read

{ixiii}

2423.

Star's

42""92.

Name, for W.B.

XV.

(2)

XV.

750, read Piazzi

142.

{ixiii}

2433.

Secular Variation in R.A., for

{ixiii}

2434.

Secular

+o

s

'4o83,

read

"4073,

read

Secular Variation in R.A., for +08-0123,

read

Variation in

R.A., for

+o

s

+08-3782 {ixiii}

2435.

+08-0136.

Piazzi IX. 59, read Piazzi XI. 59.

Piazzi XI.

III.,

{ixiii}

2437.

Seconds of Mean N.P.D. i88o'o,/or 2o"'9i, read

{!}

2692.

Seconds of Mean N.P.D., /or 3i"-o3,

{ixxi}

2726.

read Piazzi XI.

in. {xlix}

-j-2 'o397,

{Ivii}

read

33 8).

{xlviii}

R.A., for

i88o'o, for 118-586, read

Name,/o?- RadclilTe 2617, read Piazzi X. 228.

Mean

s

in

2 S '0397.

128-586.

{xlvii}

o s 'oi25,

46""48.

Oeltz. Arg. (S.) 10075, Tead Piazzi

1607.

IX. 67. {xliii}

{Ivi}

read

+oa '0040. {xliii}

Secular Variation in R.A. i88o'o, for read -)-o s 'oi25.

i6"'2i4, read

N.P.D., for

46"'47, read

2122.

{lx} in

Mean N.P.D. i88o'o,/or

{Ivi}

{lix}

{xlii}

read

4 6"76.

Seconds of Mean N.P.D. i88o'o, for 2i"'83, read 2i"'8o.

^(>"-oy,

43"'3-

Seconds of Mean N.P.D. i88o'o,/or 5o"'oo, read

1380.

read

;

.

{xxxvii}

8"'42,

'.

32" -85.

1880-0, for iz"'&7, read

Seconds of Mean R.A. i88o'o, for i s- i28, read s i 'no; Seconds of Mean N.P.D. 1880-0, for These corrections are due to 6"'63, read 6"'6<). orbital motion of Procyon as computed from Auwers' elements (Astron. Nach., vol. Iviii.

Nos. 1371-1373)-

.

Secular Variation in N.P.D., for +o"'037,

read

+o"'027.

23"- 9 i. rearf 3o"'o3.

Seconds of Mean N.P.D. 1880-0, for 59"'63, read Secular Variation in N.P.D., for 5 9" -6 1 o"-i35, read +o"-i 3 5. ;

{xlix}

1863.

Star's Name, for Piazzi XI. 161.

{li}

1959.

Seconds of

Mean N.P.D.

151, read Piazzi XI.

1880-0, for io"-88, read

2 7S3- JfStar's 4^

Name,/or B.D. +50

an ,i

(

al ,(j

(2

2 ,,d Star),

nd

No. 2412 (ist Star) read Piazzi XVII. 147 (ist Star)

Star) respectively.

ERRATA. Greenwich Ten-Year Catalogue of Stars for 1880 PAGE.

contd.

NO.

{ixxii}

2787.

73

Greenwich Ten-Year Catalogue of Stars for 1880 PAGE.

Star's

Name, for

Oeltz.

Arg.

(N.)

read

17419,

NO.

{xevi}

3744-

Lalaude 32488.

Seconds of Mean N. P.O., i88o'o,/or ^"'17, read

{ixxii}

2790.

Secular Variation in N.P.D., for

{ixxvii}

2990.

Star's

{ixxviii}

3035.

read

74,

3745-

Piazzi

174.

Seconds of Mean N.P.D. i88o'o,/or 39"'8i, read

{c}

3915.

3118.

Seconds of Mean N.P.D. i88o'o, for 3"'6o, read

3119.

{ixxxi}

3130.

58'.

57'.

and

59"'93, read

o"-i4.

3979.

Seconds of Mean N.P.D. 1880 'o, for i4"'36, read

{ciii}

4036.

Seconds of Mean 8- 94 2.

4"'33-

Seconds of Mean N.P.D. i88o'o, for i9

Mean N.P.D. i88o'o,/or 16.

;

{cu}

3" '54-

{ixxx}

Dele the observations.

Dele note to 3742, 3744, and 3745 Footnote. for note 3744, 3745, read 3742 and 3744.

16.

39"-24.

{ixxx}

;

of Obs. in N.P.D., for 8, read id.

{xevi}

XVIII.

Piazzi

;

Mean N.P.D. i88o'o,/OT- 28""49, read 28"'39 Mean Date 1800+, for 8 2 '09. read 83-90; No.

o"'o52, read

+0"'052.

XVIII.

1880-0, for 53 s 'i39, 'read ii7 ; MeauDatei8oo+,/or8i'52, read 8 3 -90 No. of Obs. in R.A., for 6, read 15 ; Seconds 8-

of

53"-26.

Name, for

Seconds of Mean R.A. 53

2788.

{ixxii}

contd.

I<J"-$Q,

read

"78.

Annual Precession

in N.P.D., for

R.A. i88o'o, for

8 8 '933,

read

6"'i99, read

6" 'z 1 2. {ixxxii}

3188.

5"-2 9

{ixxxii}

3195.

Greenwich Five-Year Catalogue 0/258 Fundamental Stars for 1890.

Seconds of Mean N.P.D. i88o'o, for $"'09, read .

Seconds of Mean N.P.D. i88o'o,/or 24"- 9 3, read

{viii}

75.

2 4 "73.

{ixxxiii}

3208.

Star's

Name, for

9 Canis Minoris...o, read 9 Canis

Majoris.,.0.

Seconds of Mean N.P.D.

1

8 80 -o,

3 8" -68,

for

read

{ix}

85

&

86.

Dele Footnote.

37"'533364.

Seconds of Mean N.P.D. 1880-0, for z"ji, read 2"'68 ; Secular Variation in N.P.D., for o"'238, read +o"'i38.

{ixxxviii} 3411.

Seconds of Mean E.A. i88o'o, for 49 s5o8, read Seconds of Mean N.P.D. 1880-0, for 498-698 read 39"'92, $Z"'\T.

{ixxxvii}

Greenwich Second Ten-Year Catalogue of Stars for 1890.

For Micro metrics Magnitude.

Micrometricas Mensurae.

lii}

;

{ixxxviii} 3439.

Secular Variation in N.P.D.. for

{xiv} o"'o88

589.

read

Annual Proper Motion read

3510.

Seconds of Mean N.P.D. i88o'o, for 37" -04, read 2" 4 0.

{xv}

616.

{xc}

3517.

Seconds of Mean N.P.D. 1880-0, for I3"'i9, read

{xxii}

968.

{xxiii}

1014.

{xxiii}

1050.

i3"'57-

{xci}

3525.

Seconds of Mean N.P.D. "-

3I

{xci}

1

88o'o, for 31 "-91, read

9 6.

Annual Proper Motion read

-

3556.

Seconds of Mean N.P.D. i88o'o, for o"-26, read o"'47 No. of Obs. above Pole, for 7 read 6.

|1'}

3563.

Seconds of Mean N.P.D. i88o'o,/or 2i"'42, read

{ixvii}

Star's

+os 'oo23.

Name, for

{xcii}

{xnv}

3718.

Seconds of Mean R.A. 43

S>

u

8

i88o'o, for 43 '353,

735-

GREENWICH SECOND TEN-YKAB CATALOGUE FOR

1890.

read

in

R.A., for

+o

Eridani...T 3 , read

s

'ooi4,

n

Eri-

Footnote.

For Nos. 2403-2404, read 2402-2403.

Seconds of Mean R.A. 1890-0, for 3i"-i66, read 3i"'>55-

2l"'40.

+o"'oo5,

Mean N.P.D. 1890-0, for 25. 45'., read 24. 45'.

Seconds of Mean N.P.D. 1890-0, for 37"'O9, read 37" -26.

;

3204.

in N.P.D., for

005

+o"-o88. {xc}

read

Measurse,

{ixxx}

For No. 5882, read 3881.

{ciii}

For No. 3046, read 5046.

SUPPLEMENTARY LIST OF

ERRATA THE GREENWICH CATALOGUES FROM

IN

Greenwich Seven-Year Catalogue of Stars for 1860

Greenwich Six-Year Catalogue of Stars for 1840. no.

PAGE. 69

1328.

69

1330.

Mean R.A. 2z h

1840 Jan. 2^. ( 4 8 ).

.

Mean Year

R A.,

for R.A.,

Annual

insert

2.

.

1840 Jan.

i,

h for 22

Precession in R.A. insert

.

(io

8

read

),

2.,

+2

8

read 22 h 2 m .

1332.

page 66 Seconds of Mean K.A. 1840 Jan. i,for 2o s 'o3, read

dele the observations

Annual Precession in R.A.,/or -\-i 'i2.6, Mean N.P.D. 1840 Jan. i, for

;

8 -j-2 'io6

49',

1980.

Greenwich Seven- Year Catalogue of Stars for 1864. {xcvi}

1694.

{cxxii}

2231.

for S3

S

'37,

read

Mean N.P.D. 1860

Jan. i,for

105, read 101.

The above additional Errata have been kindly communicated

by Prof. Auwers since the Second Ten- Year Catalogue was printed.

For Erratum on page 67 rearf Mean R.A. 1840 Jan. i, for 22 h 2. I5"'i7, read 22 h 2 m (4 s ) dele Mean Year for R.A., No. of Obs. in K.A., Mean R.A. 1845 Jan. i, Mean Year for R.A., No. of Obs. in R.A. .

.

;

Seconds of Mean R.A. 1840 Jan. i,for 2o s- 03 read 2o s 'o5 Annual Precession in R.A. for +2 S 'O99 Mean N.P.D. 1840 Jan i, for read -|-2 s 'io6 34. o', read 34. 12'.

Greenwich Twelve- Year Catalogue of Stars for 1845, and Greenwich Six- Year Catalogue of Stars for 1840.

Note.

A

;

1982.

i,

8

5i '37-

;

{elxviii}

Seconds of Mean R.A. 1864 Jan.

12'.

.

{clxviii}

of these stars.

;

read 34.

Greenwich Twelve- Year Catalogue of Stars for 1845.

1979.

Seconds of Mean N.P.D. 1860 Jan. i, for 21" '84, read 31" '84.

No correction for proper motion has been applied in fonning the Mean R.A., or the Mean N.P.D.

s

208-05

{clxviii}

9751885.

1971.

contd.

'i27.

For Erratum on page 66 read and numbers.

34.

NO. '943-

.

1331.

read

PAGE. {cxiif

No. of Obs. in

1840;

insert 2.

Mean K.A.

69

h for 22

i,

1840.

For Erratum on page 67 read Insert Mean R.A. 1840 Jan. i, 2 m . I5 8 'i7 Mean Year for R.A. 1840 No. of Obs. z.

Mean R.A. 1845 Jan. i, 22 h 2 m 25 s- 5i Mean Year for R.A. 1845 No. of Obs. 3.

n\

table of the corrections required to R.A. and N.P.D. of certain stars on account of proper motion for the fraction of the year which had not been applied in the original computations for these Catalogues is given at the end of the These Greenvrich Seven- Year Catalogue of Stars for 1860. corrections have not been included in the list of Errata

printed in the present Catalogue.

;

;

.

.

;

!

Greenwich Second Ten-Year Catalogue of Stars for 1890.

Greenwich Six- Year Catalogue of Stars for 1850. (xxxv)

108.

(xlviii)

375.

No. in Bradley, dele, 151.

Seconds of Mean R.A. 1850 Jan. i,for

8

'54,

read

in

Groombridge, insert 155.

280.

{xiii}

511.

,,

,,

insert 303.

1531.

,,

,,

insert 910.

{xxxiii} 5

No.

{viii}

{xxxviii} 1751.

Annual Proper Motion in R.A., for

+o

3i

oo5, read

o'ooio.

(Ixxviii)

907.

Seconds of Mean R.A. 1850 Jan. i,for i4 8 '6o read 8

i4 '58.

Annual Precession

+

I

8

in

R.A.,

Jan. i.for

999.

26.

7',

'428,

read

read 26.

50" -27.

Year, insert 1850-4 No. of Obs., insert Dele observation and numbers.

Mean (Ixxxiv)

+i

;

Variation of Precession -|-o"'376, read o"'^6.

Secular

for XVI.

(Ixxxix)

1056.

No. in

(cviii)

1418.

Seconds of Mean N.P.D. read 2."'i$.

Piazzi,

io,

Precession in N.P.D., for

in

o'.

933.

Seconds of

Mean R.A.

read XVI. 103.

1850 Jan. i, for z"'4i, 16"'99, read

i6"'9o.

1860 Jan. i,for 53^03, read

8

Seconds of Mean R.A. 1860 Jan. 8 4 -i S

i,

for

S

3 '56

read

2198.

{xlvi}

2200.

insert 1294.

1848.

Secular Variation in R.A., read

{xlvii}

2203.

{liv}

2560.

insert 1474.

{ixxxii}

3954.

insert 2268.

{xc}

4384.

insert 2448.

txc}

4398.

insert 2455.

{xci}

4432.

insert 2479.

{xciv}

4580.

insert 2581.

{xciv}

4594.

dele

{xcviii}

4774.

insert 2717.

{cif

4908.

insert 2821.

{cxxx}

6356.

6572. {cxxxii {cxxxiv}

2577.

insert 3841.

Annual Proper Motion

in N.P.D., for -|-o"'oi9o,

read -|-o"'i9O.

+o s 'oo86.

GREENWICH SECOND TEN-YEAR CATALOGUE FOR

insert 1292.

insert 1278.

.

{cvii}

insert 1184.

{xlvi}

N.P.D., for

52 '92.

{lxxxviii}i46i.

No. in Groombridge,

{xliii}

2016.

i.

Greenwich Seven-Year Catalogue of Stars for 1860. {ixii}

Footnote, for Nos. 2005, 2007, read 2005, 2006.

{xliii}

'42I.

Mean N.P.D. 1850

908.

for

s

1890.

{cxxxvi} 6666.

No. in Groombridge, insert 4071.

GREENWICH

SECOND TEN-YEAR CATALOGUE OF STARS FOR

1890, FROM OBSERVATIONS MADE AT THE

ROYAL OBSERVATORY, GREENWICH, 1887 to 1896.

GREENWICH SECOND TEN- YEAR CATALOGUE FOR

1890.

NOTE. STAB'S NAME. The "

Name "

Star's

adopted

in

this

Catalogue

is

taken

from one of the following authorities,

the order of preference being the order of mention of the authority below 1.

Flamsteed's

No.

constellation

and

with

constellation,

:

Bayer's

taken

letter,

from

Baily's

from the British Association Catalogue.

FunJainanta Aittmnom-la: deduced from Bradley's observations, referred

edition of Flamsteed, or 2.

The No. as

3.

4.

in Bessel's

"Bradley."

The Hour and No. in Piazzi's Catalogue, The No. in Groombridge's Catalogue.

edition 1814.

6.

The No. in Baily's edition of Flamsteed's Catalogue, referred to as " B. F." The Hour and No. in Weisse's two Catalogues of the stars in Bessel's Zones, " " W. B." and " W. B. (2) respectively.

7.

The No.

5.

to

Lalande's Catalogue,

in

by the

published

Fedorenko with supplement referred

to

as

Britisli

"Lalande,"

Association, " Lalande F."

or

referred

that

in

to as

edited

and " Lalande

F.

by

(2)"

respectively.

8.

The No.

9.

The No. "

(N.) 10.

The No.

in Lacaille's Catalogue of Southern

two Catalogues

in Oeltzen's

or

Stars,

of Argelander's

published by the British Association.

Zone Observations, referred to as "Oeltz. Arg.

" Oeltz.

Arg. (S.)."

in the First or

Second Radcliffe Catalogues, referred

to as

"

Radcliffe

"

and "Kadcliffe

"

(1860) 11.

12.

respectively.

The No.. in Carrington's Eed Hill Catalogue.

The Zone and No. in Argelander's Bonn " Durchmusterung " "

13.

or Schbnfeld's continuation of

the

"

Durchmusterung (Bonn Catalogue, Sections I., II., III., and IV.; Bonn Observations, Vols. " B. D." III., IV., V, and VIII.) referred to as The No. in the British Association Catalogue, referred to as " B. A. C." in the Cape " in the Harvard to as H. referred in the Greenwich Catalogue (1880); P."; Photometry, ;

Catalogues; or in the Catalogues of the Astronomische Gesellschaft (1875).

MAGNITUDE. The magnitudes

from the following sources in the order given. The Harvard PhotoCatalogues of the Astronomische Gesellschaft or the Bonn Durchmusterung Struve's Micrometricae Measures for double stars (marked t) ; the Uranometria Argentina,

metry (marked *) (unmarked) ; Southern

;

are taken

the

the

Meridian Photometry (Harvard), or the Argentine General Catalogue for 1875 for Southern Stars (marked t), the Authority in each case being stated in the Notes.

In the case of variable stars, the limits of magnitude and the period given in the Notes are taken from Mr. Chandler's Catalogue in the Astronomical, Journal, No. 379.

PROPER MOTIONS. Auwers' " Neue Eeduction der Bradleyschen Beobachtungen," or his "Catalog der Fundamental Sterne"; from the Catalogues of Professor Porter; or from the list given in the Introduction. Other Authorities used are mentioned in the Introduction.

The proper motions

are generally taken from Professor

SECOND TEN-YEAR CATALOGUE OF STARS FOR FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO

"1

a & No.

a

|

'755

18900,

1896.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

(IV)

HIJ 3

SP

i

'

No.

=1

No. of

No. of

Obs. ;

Mean

4

Star's

Name.

II.

A.

Mean

Preces-

Secular Varia-

sion.

tion.

.3

Date.

a

U

Annual

Obs.

Annual

1800

+

1890-0.

o

N.l'.D.,

Animal

Mean

Proper Motion.

1890-0.

|

Mean

Date.

Preces-

Secular Varia-

sioo,

tion,

Annual Proper Motion.

I

1890-0.

1890-0.

1800 -f

Js

1890-0.

1755h

17-6

O.

7-

34-177

93-03

4

W'*|

O.

7.

34-244

93-69

70

B. (2)0. 152-3..

6-3*|

o.

89-13

3

90-39

3

89-86

3

(Iroombridse 19

5'

52

88 Pegasi

53

W.

23 Androinedte

54

5-8* 6~o*

Lacaille 7

55

+ 3-I235 + 3-0840 + 3-0948 + JII + 3-0488 + 3-1805

|

7.

42-501

!

-

o.

7-

47 983

o.

8.

7-349

i

]

56

21

Groombridge 21

...8-0

o.

8.

20-571

95-61

3

57

22

Groombridge22... ..,7-6

o.

8.

25-806

3

3

6-7

o.

8.

48-666

93-20 88-12

3

...

...S-i

o.

8.

49-047

95-61

3

58

24

Piazzi 0. 13..

59

23

60

25

Groombridge 23 Groombridge 25

61

26

.

.

.

.

...8-0

o.

8.

'

53-768

3

3'

3

...

3

+

3-1809

+ 3-1164

!

+ 3-1366

Groombridge 26 B. F. 3310

8-5

o.

9.

5-692

94-11

3

62

54'

o.

9.

17-582

88-57

3

63

Piazzi 0. 19

5-9* o o

o.

9.

28-310

90-53

3

o.

9.

32-010

91-70

3

7-9

o.

9-

45-957

92-44

3

+ 3-0628 + 3-1002 + 3-1254 + 3-139

6-2*

o.

9-

59-994

9573

3

+

9'5 6-1*

o. 10.

9-781

93-74

3

10.

6

64 65

27 28

Groombridge 27 Groombridge 28

66

20

Bradley 6...

B. D. +29' No.

67 68

30..

36 Piscinm

o.

Piazzi 0. 25

5-8*

o. ii.

54-875 2-661

96-71

69 70

Groombridge 32

7'5

o. ii.

4-368

88-76

7'

B. D.

No. 6. ..8-8

o. ii.

72

Groombridge 35 B. D. +36 No.

37

Groombridge 37

73

74

76

36

77

38

78 79 80

25 A in n >n> l

Groombridge 42 8 Ceti

44

Groombridge Groombridge Groombridge Groombridge Groombridge

45

87 88

47

46 49 So

89

9'

46 49 50

Groombridge 5 1

5'

27

'7

52

Groombridge 52

96

S3

97

54

98 99

55

Groombridf^ 53 Groombridge 54 Groombridge 55

100

93-41

5

8-7

o. ii.

56-718

89-14

3

7-0 6-8

O.

12.

5-656

93-34

3

2

O. 12.

8-671

92-76

12

-

12.

9-676

95-48

12.

I3'l62

90-90

4 4

O. 12.

21-699

95-64

3

12.

34-847

94-20

5

o. 13.

16707

94-37

4

....8-5

o.

13.

42-742

92-50

4

...'3-6*

o. 13.

49-345

91-14

24

,...6-2

o.

54-629

87-95

3

.

4 -6*

.

.

.

o.

14.

14-638

92-06

14.

15-175

9376

7-9

o.

14.

18-772

94-79

3

o-

H- 39-137

93-85

3

.

.

.

.

.

39-842

94-57

3

...7-4 ...8-0

o.

14.

40-918

94-79

3

o.

14.

43-177

91-27

4

...8-8

o. 14.

47-383

96-88

3

.ds-6*

o.

14.

56-132

96-58

i

...8-5

o.

15.

12-063

91-27

4

o. 15.

19-586

92-27

6

o. 15.

20-968

7-3

o- 15-

39-437

7'3 7'4

o. 16.

P5'3* -J8-4

.

.

3

20-042 +0-024

63. 37. 24-64

89-13

3

20-042 +0-024

'979

90-39

3

20-041 +<ro24

116. 37. 56-91

89-86

3

20-040 +0-024

95-58

3

2

93'58 88-12

3

j

3

20-038!

95-59

3

20-038!

94-83

3

5^54 94-26

3

2 ,

+ 3-350I + 3-I326 + 3-2032 + 3-126I + 3-3I52 + 3-I472 + 3-059 1

49- 34-

+0-0732' +0-0727

24. 16.

+0-0285 +0-0676

49- 34- 47-39

1+0-0408

38- 59- 40-11

9-68

I

24. 24. 24-96

26.

2.

24. 29.

43-24

i

|

i

20-0361

63- '9- 39-80

90-60

4

20-036 +0-027

+0-0318

46. 24. 3O-2O

91-70

3

20-03(1

40

33- 39-87

92-44

3

20-035'

13. 39.

38-02

92-97

it

20-034 +0-030

59- 49-

4i'23

9373

2

20-033 +0-029

82. 22. 14-83

96-72

7

20-030'

41-38

93-64

7

43- 59- 46-93

20-030 +0-031 20-030 +0-031

003^

4.

29.

+0-I372 +0-04I2 +0-0257 +0-1097

96-41

3

2

20-029!

39. 10. 41-17

93H2

5

2

2O-O26 +0-032

4-

15-12

89-14

3

17. 39.

50-09

S3-"

88. 55. 22-56

9276

14. 20.

2

20-024'

53- 49- 28-74

90-63

7

..

20-023

+o"34

+0-II2I

17. 29.

16-17

94-66

4

3

20-020!

+0-036

+0-03I9 '

O OO22

O 003

'

0-002!

+ 3-I5I2 + + .3-!559 +0-0334 + 3-1687 +0-0383 + 3 45 +0-0292 + 3-I527 +0-0320 +5-5317 +0-0067 o-ooi; 3-I554 +0-0321 3 'HO? +0-02651+0-0038 3-1599 +0-0335

+ 3-0841

3

92-50

4

...

2-08

90-28

19

...

49- 52. 5I-53

87-95

3

...

41. 44. 41-24

91-57

...

74- 21. 33-53

87-80

..

...

99. 26.

... ...

20-012 +0-038

49. 41. 17-06

94-79

...

20-012;

46. 54. 57-14

91-27

...

20-012 +0-038

92-76

4

2O-OII +0-078 20-011 +0-038

..

20-009 +0-039 20 -008, +0-039

52-26

49 63

91-27

52. 38. 27-17

92-27

46. 53.

39. 24. 55-84

9677

a close double and forms the binary 02 a close double and forms the pair 2 13. limits of magnitude are 7-0-8-0 and iro-12'o

99.

The

6.

19.

34- 49-

2.

is

:

the period 445 d

.

+0-038

20-008 +0-039

45. 40. 23-59

95-66

is

.

3-44 8'6o

2

+0-003

20-014 +0-037 20-012 +0-038

94-57

9.

+0-032

+0-037

41. 38. 30-99

i.

!

20-014 +0-037

94-79

2-36

This star This star

20-0141

93^5

82. 25. 14-16

+'47

20-017 +0-036 20-017 +0-035 20-016 +0-036

3-54

94-69

53.

66.

+0-034

45. 40. 16-67

35- 57- 53'32

3

20-025

20-025 +0-033

46. 55. 56-52

46. 41.

-I

3 '05

+0-0475 3-2173 +0-0497 3-1958 +0-0420

96-77

+'35

+0-02520-005

3-2080

22-767

2

3

4

4

17.

+"34

90-90

28- 53-

+0-009

20-025 +0-032

95-24

94-70

o.

+0-032

20-025

3-85

52-215

281 8-4

12

20-026!

49. 51. 50-24

o. 16.

Oeltz.

2

+0-016

+0-032

+0-1403 +0-0287 +0-0612

92-95

3

...

3

I

+0-030

3

0-005

95-66

+0-028 +0-028

88-76

28. 55.

17-100

+0-027

14 27- 55 '34

3-23/8 1+0-0625+0-0195 3-3419 '+0-1038'

17.

20-037 +0-027

+0-0177

4

o.

3

3

3

...T var.

+0-026 +0-027 20-038 +0-026

88-57

1443+0-005?

+0-131

1

100. 10. 52-52

+0-0388

+0-013

2O-Q4O +O-O26 20-040 +0-026

0-0029

+0-0289 3^656 +0-0381 3-0958 +0-01 12

+

'

95-03

Cassiopeise

Arg. (K.

20-042 +0-024

60

+3-0738 +0-0032,

3

o. 14.

4

93 l6

3-3124

+ + + + 3-3275 + 3-I575 + 3-1249 + 3-2941

5 |

...7-1

.

.

13.

o.

...fo .

O.

7-3

.

Andromeda

95

53-204

O.

Radcliffe56 41 Piscium

16

93

45 47

3

ii.

O.

40 Piscium

'5

86

94

Groombridge 43 Groombridge 44

96-41

o.

....7-6

..o-

42

17-095

7-1

....7-4

93 -3

75. 25. 40-99

+O-02O2 3-0810 +0-0065 3-1884 +0-06O2 3T393 +0-0347

3

.

40. 53. 17-42

+0-010110-0007 +0-0173 +0-028410-0124

+3^890 +0-0729

7

.

i

Groombridge 41

43

84

i'< I:

4'

4

83

92

Groombridge 36 Groombridge 38 Groombridge 39

39

Si

85

25..

Piazzi 0. 33

75

82

+75

35

+0-0371

,

I

O'Oig

i

20-006 +0-041 20-004 +0-043

+0-043 -19-996 +0-044 -19-9951 +0-044

+0-024

!

+0-036 ... ... ;

I

i

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

a o

3 a

6

IOI 1

02

103

104 105

106 107 1

08

109

no in 112

H3 114

"5 116 "'7 118

119 120

;

121

122 '23

124 125

126 127

128

129

'3'

132 133 '34 '35

136 137

'38 '39 140 141

142 143

44 145

146 '47

148

149 15,.

:

_J>

|

Ja .3*2

d

fc

&

1755-

1810.

Mean R.A..

Star's

Name.

Mean Date.

1890-0.

1800

+

{vi}

No.

SKCDND TK.N-\'EAU CATALOCJUK OF STARS FOR

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1890.

1

c

"2 .

No

41 II -

-a| 6

.*

o

fc

*

1755.

1810.

{vii}

SECOND TKN-YEAR CATALOGUE OF STARS FOR

{viii}

1890-0.

No. of Hi/an K.A.,

No.

Star's

.si

Date.

f 1755.

1800

No.

Annual

Mean

Preces-

Date.

sion,

Secular Varia|

Annual Proper Motion.

tion,

1890-0.

1890-0.

1800

1890-0.

+

18900.

a>

o. 42.

9-487

90-07

4

-8

o. 42.

16-343

88-85

4

o. 42.

26-799

96-42

3

1^4 -o'

o. 42.

26-990

Oroombridge 149. ...7-6

o. 42.

26-987

90-51

\V. B. 0. 704.,

o. 42.

28-303

o. 42.

34-068

8972 8975

.6-0' 62 Piscium B. D. +37 No. 141 9-4

o. 42.

34-939

94-01

5

o. 42.

35 '249

93-82

3

25 Cassiopeise

o. 42.

36-047

92-05

3

7

+42* No.

124..

1

74

[8

24 Cassiopseie (Oomes)nJ 6

146 149

256

24 Cassiopeiae

W.

257

259 260

Proper Motion.

i

Mean N.P.D.,

i

9-2

t>.

B. D.

253

258

tion,

Obs.

Annual

1810.

B.

255

sion,

1890-0.

+

^

252

79

Preces-

Secular Varia-

1890-0.

251

254

Annual

Mean

Name.

No. of

:

Obs.

84 83

B.

0.

8'5 8-2

707.

+ 3-0392 + 3-3018 + 3-4550 + 3-4550 + 3-3I34 + 3-1099 + 3-1145 + 3-1015 + 3-2600 + 3-3708

26 3

i

4 3

-4-0-0003

97. 45.

1971

+0-0357 +0-0611 +0-1351

46. 55.

0-40

32. 46.

+0-0611+'0-1351

32. 46.

90-07

4

88-85

4

19-713 +0-097

9-00

96-42

3

-19-710 +0-IOI

4 -02

94 "06

26

-19-710 +o'ioi

+0-0374

45- 37- 39-70

90-51

-19-710 +0-098

+0-0088 +0-0094

81. 22. 43-61

8972 8975

-19-710 +0-092

80. 20. 29-11

1+0-0078 +0-0050

83. 18.

3-42

94-02

5

-19-708 +0-092

+0-0292 1+0-0465+0-0022

52. 47- 57-95

93-82

3

-19-708 +0-096

39- 37- 54-o6

9i'oi

3

-19-708 +0-099

6-62

,

,

-19-715 +0-0901 i

+0-516 +0-516

-19-708 +0-092 0-004

'

+0-015

I

Piazzi 0. 189

261

262

'45

263

36-749

94-44

9

o. 42.

38-842

93-71

3

o. 42.

43-443

94-51

I

+ 3-7463 + 3-2558 + 37778 + 3-1030 + 4-I835 + 3-7642 + 3'3OI 9

3

|

'47

264 265

S'7*

Groombridge 145. ...7-6 B. D. +36 No. 128 9-4

o. 42.

Groombridge 147 ....7-3 63 Pisciuin

85

84-6'

266

'43

Groombridge 143

....

267 268

148

Groom bridge 148

....

269

'5'

52-552

93-88

o. 42.

58-465

92-37

54

j

3

6 7

o. 42.

58-918

92-99

2

6-7

o. 43.

0-290

3

No. 181 9-1

o. 43.

19-556

95-48 88 -8 1

Groombridge 151 ....6-9

o- 43-

27-390

93-02

5

Lalande 1323

o. 43.

31-726

94-47

3

B. D.

270

o. 42.

+42

7-7

3 i

(

271

87

152

35 Andromedse..

K

.

Lalande 1348

272

.

4-4* 6-1*

+ +

1+0-0067 +0-0500

85. 17.

94'44

9

-19-707 +0-092. +1-15

+0-1191+0-074

20.

24-30

93-48

2

-19-707 +o'iio

+0-0285 +0-1253 +0-0079+0-0035

53- 29- 55-26

94-5I

3

-19-706 +0-097

4

-I9'703

93-21

36

-19-702 +0-093

91-60

2

-19-702 +0'I22

70 95 -42

3

-19-701 +0-III

88-81

3

-19-696 +0-099

93 -02

5

-19-694 +Q-IOI -19-692 +0-099

+0-2292 +O-I22O +0-0350 3-3442 +0-0414 3-2669 +0-0297

o. 43.

44-854

94-66

13

+3-2890

o. 43.

48-673

95-61

3

+ 2-9555

+o

9.

19. 25.

27-17

o.

49-89

83.

12. 38.

44-38

19. 49. 31

j

I

;

0-23

+o-iu +0-037

'

47. 36. 20-55 42. 50.

7-23 J

52. 23.

o 0009

0328

vooSi

3

43-56

49. 31. 13-24

94-66

13

6-46

95-61

3

114. 44.

-19-689 +0-100 19-688 +0-091

...

+Q-OIO

j

Piazzi 0. 196

5-9* 8-2 8-6

o. 44.

9-665

91-22

3

o- 44-

"3'594

9571

2

o. 44.

27-507

89-81

4

Bradley 74

5-5*

o. 44.

37-081

95-02

2

Piazzi 0. 199

6-2

278

Lalande 1367

279 280

W.

Piazzi 0. 203...

7'5 8-5 6-8

281

Bradley 91

6-6

o. 45.

282

Piazzi 0.

o. 45.

....

7-0 8-2

o. 45.

....

8-6

o. 46.

8-5

273

'S3

Carrington 104 W. B. 0. 734

274 275 276

74

277

'54

283

156

284

157

0.

743

208

Groombridge 156 Groombridge 157 Lalande 1432

285

286 287 288

B.

90

158 160

290 291

162

292 294

90-00

38-427

94-09

7

+ 3-0854

49-284

89-92

7

+ 3-1298

52-210

94-25

2

14-078

93-84

3

o. 46.

23-416

89-72

5

+ + +

28-505

9I-57

4

46. 30-352

94H7

7

89-76

3

o.

45. 17-356

o-oooo

+0-0059 +0-0110 3-4616 +0-0580 3'3423 +0-0390 3-1199 +0-0098

44-222

93-18

3

o. 46.

44-427

93^7

4

B. D.

o. 46.

46-732

93-82

3

3-2865

o. 46.

47-968

88-37

4

3-2972 +0-0322

B. (2)0. 1160.. 7-8

o. 46.

55-177

94-52

3

3-2882

B.

8-4

o. 47.

3-888

89-84

4

+0-0309 +0-006 ... +0-0094

7'9

o.

47.

3-992

3

+0-0450.

o. 47.

14-139

o. 47.

19-519

5-0* 6-8

o. 47.

23-141

o. 47.

26-842

8-6

o. 47.

26-970

+38 No. 128 9-1 Groombridge 162 ... 6-5 0.

789 ...

20 Ceti

66

5

6

o. 46.

Groombridge 161 .... 7-0 Groombridge 164.... 7'7

1

89-87

49-835

Groombridge 160... 8-5 Lalande 1433 8-4

781

161

300

o. 44.

o. 46.

0.

164

165

4

+0-5840+0-0284 +0-0478+0-013 +0-0401 3-II74 +0-0096 +0-0480

7'3

B.

297

299

9279

+ 5-2127

+ 3-3375 + 3-5491 + 3-1352 + 3-3823 + 3-3578

296 93

44. 49'034

Piazzi 0. 211

Groombridge 166

....

43-145

91-42 93-00 94-42

2

41

3

+0-0381 +0-0721

0-0104

1+0-0115 +0-0446.

+0-0409 +0-0307

o-oiog

:

+0-0953!

3-3762

+0-0432J

3-0642

+0-0036 +0-0505 +0-0392

253-254. These stars form the pair

S

95-82

3 2

78. 46.

5-12

89-81

4

6. 53.

24-06

92-08

3

89-12

4

39-

5-

27-96

43- 52. 39-78 80. ii. 15-81 I-

91-22

92-79 89-87

60.

...

...

4

19-682 +0-101 19-681 +0-174

!

19-677 +0-096 1

4

-19-675 +0-155

+0'02O

I

-19-673 +0-104

0'02

4

-19-671 +0-103

5

6

I

19-670 +0-097 1-19-663 +0-106

37-59

90-05

87. 12. 43-94

93-95

6-i

19-657 +0-IOI

77. 48. 48-65

89-92

?

34. 20.

2-56

94-48

19-654 +0-099 19-653 +0-109

44- 47- 34-44

94-78

2

79. 59- 47'8i

89-72

5

45- 27. 51-55 29. 28. 45-48

91-57

76. 56. 56-60

89-76

41.

39-

2

3

-

-19-643 +O'IOO

-19-642 +0-107 -19-642 +0-113

-0-13

14-23

93-18

3

43. 29. 58-74

93-37

4

+Q-IOI -19-638 +0-108 -19-638 +0-108

51. 41. 57-29

93-82

3

-19-637 +0-106

50. 21. 14-84

88-37

4

-19-636 +0-106

-0-049

3

-19-634 +0-106

0-17

4

-16-632 +O'IOI

3

-19-632 +0-109

9.

51-33- 33-56 80. 47. 34-91

89-84

40. 56. 31-41

3

-19-

...

24-

9-

44-37

91-89

2

-19-629 +0-118

...

42.

4.

41 -87

94-81

3

-19-627 +0-109

91. 44. 30-69

92-33

39

37. 54. 27-89

93-83

3

44. 46. 45-46

94-42

3

O'OO22

+0-058

-19-646 +0-106

!

93-93

1

+ 3-6824 + 3-3495

20-64

5.

o.

Groombridge 163

298

5

8.

45- 35- 5I-35

7-6

159....

163

295

90-69

+0-0376 +0-9330 +3-1237 +0-0103

+ 5-9238

4-9*

Groombridge Bradley 90

W. W.

293

o.

39751

44-

...

i

o. 46.

W.

289

-

3

-19-626 +O-IOQ

3

- 19-625

+Q-III

19-625 +0-109

+O-OO9

FROM OBSERVATIONS AT THE KOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{ix}

SECOND TEN- YEAR CATALOGUE OF STARS

No.

FOI;

1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xi}

{xii}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xiii}

{xiv}

N*o.

SECOND TEN-YEAR CATALOGUE OF STARR FOR 1890-0,

FROM OBSERVATIONS AT THE IVOYAL OBSERVATOEY, GREENWICH, 1887 TO 1896.

No.

{xvi}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FKOM UBSERTATIONS AT THE liOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xvii}

{xviii}

So.

SECOND TKN-YEAK CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, OUKENWICII, 1887 TO 1896.

No.

{xix}

{XX}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxi}

fxxii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT

No.

TIIE

EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

(xxiii)

{xxiv}

j

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FKOM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxv}

{xxvi}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOU 1S90-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxvii}

{xxviii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{XXX}

No.

SECOND TEN-YEAR CATALOGUE OF STAKS FOR

1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GKEENWICH, 1887 TO 1896.

No.

{xxxi}

{xxxii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FKOM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxxiii}

{xxxiv} 1

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxxv}

{xxxvi}

No.

SECOND TKX-YEAK CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxxvii'}

{xxxviii}

No.

-COfO

SECOND TEN-YEAR CATALOGUE OF STARS KOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xxxix}

SECOND TEN-YEAU CATALOGUE OF STARS FOR 1890-0,

No.

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xli}

{xlii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOU 1890-0.

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xliii}

{xliv}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1893'0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xlv}

{xlvij-

No.

SECOND TSN-YEAU CATALOGUE OF STABS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

Mo.

{xlvii}

(xlviii}

Xo.

SECOND TEX-YEAR CATALOGUE ov STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xlix}

{1}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOE

1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{11}

{lii}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1S90-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No. of Obs.

Mean R.A., Star's

No.

Mean

Name.

No. of

Annual Preces-

Secular Varia-

sion,

tion,

Date.

Obs.

Annual

1755-

2501

1800

1890-0.

+

... |

2503

Piazzi VIII. 119 8-5 Oeltz. Arg. (N.) 91849-0

32. 50-229

9623

3

32

54-093

95-57

2

Mali

33-

W259

90-49

SnS'O*

-

3 i

W'6 k'6*

38 Cancri

1220 j

2505

!

I2I 4

2507

1465

34 Lyncis

1466

2506

95-86;

3

33- 24-694'

95-12.

3

Groombridge 1466.. 7"8

8. 33.

26-561

Piazzi VIII. 124

7-2

8- 33-

32-037

1467... 7 '4

8- 33-

36-171

.

...

33- 23-428

95-44

+ + + + + + + + + +

'

...

Groombridge

1467

W. W.

2509 2510

2512

Preces-

Secular Varia-

sion,

tion,

Date.

I

;

B. (2) VIII. 790 7'7 B. (2) VIII. 793 8-0

1890-0.

1800

1890-0.

+

Sgo'O.

0-0130

3-4543

..

-0-0365] 2-5637 +o-ooi8| 3-4575

0-0131'

4-1664

0-0380-1-0 -ooi

4-1311

18-41

95 '97

+ 12

44. 42. 22-57

95-57

+12-4081+0468

IIS. 52. 13-29

90-49

4-57

96-18

43- 46. 5I-83

95-12

70.

4-I335

0-005

3-0365

I.

69. 50.

6-22

44- 43-

0-0130;

70.

0-0298.

49- 35- 39 89

4.

19-36

,

!

93-53

8- 33-

37-830

8. 33-

39-I03

93-21

i

3-9643

3-4526

o-oi3oj 3-4523 10-01301

403;

+0-391

95-44

+ 12 426 +0-288 + 12-441 +0-390 + 12-443 +'47 + 12-4461+0-467

92-90

+12

93-53

+12-456, +0-448

93'77

O0l8 O'o88

r

45i|

+0-389

]

70.

3.

34-3I

70.

4.

I5-I4

93-03

+12-4581+0-389 + 12 45 9i +0-389

:

39 Cancri

..................

6-9

33 46-787

93-18

0-0075

69. 36. 16 ii

93-62

+12-468! +0-390

0-018

40 Cancri

..................

'7-0

33 5I-932

94-22

0-013210-0043

69. 38. 27-83

33 59-524

9467

0-0130!

70.

4.47-15

+12-474+0-390 + 124831+0388;

0-024

J8-o

9473 9465

34

95 96

0-0131

69. 55. 29-76

96-19

+12-486 +0-389

69. 56. 30-02

96-19

2514

B. D.

2515

1224

2516

1225

2517

...

42 Cancri

1228

2522

2524

1232

7

2526 2527

2528 2529

1469

2530

1463

1-817

34

3-210

95-96

8-455

93-35

34. 14-131

9564

8. 34-

^7-2

1468... 7 -2

8.

6-

8. 34.

24-268

95-93

8. 34-

37735

95-18

8- 35-

8-559

91-98

Bradley 1228 Mali ..................

8.

35- 30-973

95-9I

8.

35- 47-655

89-80

..................

&J3-9+ ............... ...............

8. 36.

y4'

A

1

3-4618

0-0133

+ 3-4544 0-0131 + 3'45'7 0-OI30 + 4-I272 [0-0366 + 3-4550 0-OI3I + 3-4518 0-0131 + 2-4908 i+0'0023 + 3-4568 0-0133 + 2-3467 -(-0-0028 + 3-4880 0-0143 + 3-3128 0-0097

48-85

94-73

+ 12 487 +0389 + 12-492+0-388 + 12-499: +0-465 + I2-5II] +0-388 + 12-5271 +0-388

-So

91-98

+12-562

'

Bradley 1227 .......... 7-7 Mali

43 Canuri 45 Cancri

2525

...............

Groombridge

2520

1230

+20

41 Cancri

1468

I22/

2523

.....

No. 2165:8-3 Bradley 1224 ......... 7-1

1226

5 6'

Hydrse

47 Cancri S4'3' B. D. +i7No. 19259-0 Piazzi VIII. 137 6-o*j

55-182 8-613

8. 37.

28-446

8899

8. 38.

25-989

93-32

8. 38.

39-789

93 '94

0-006 ;

!

;

;

92-83

8. 37-

0-004

:

+

!

0-003 0-007

O'll

93-00

44. 44. 47-46

95-64

69. 53. 29-98

96-16

70.

70.

4.

i.

119. 10.

1 1

O'OOO -0-0087 -O-OOI2

4-10 6-88

95-91

11-48

92-74

69. 44.

0-0058 -O-OO29

+ 3-4183 0-0125 + 3-3983 0-0120 + 5-5083 0-1224 + 2-4108 .-(-0-O028 + 9-I675 0-5713 + 11-5803 1-0500 + 3^953 0-0120 + 3 6441 0-0195 + 3 6439 0-0195 + 3-4029 0-0122 + 9905 -0-1653 + 3-1946 0-0071 + 2-597I +0-0019

51-156

94 5

3

8- 39-

10-357

93-94

4

124. 55.

68.

8.

Groombridge 1463... 7-3

8. 39.

20-078

93-85

Lalande F. 1339 7-0 B.D. +17 No. 19319-3

8. 39.

52-869

96-17

i

2531

2532

8- 39-

53-4I5

93-28

4

8. 40.

0-531

[

2535

3

|

W. B. (2) VIII. 9586-5!

48 Cancri i4"4t Lalande 17260 8-3

I2 39

.

4

8. 40.

8.

95^7

2-376 40. 16-202

9

93-I5

3

+ + 12

89-80

76. 55- 30-58

95-26

86. 12. 24-78

89-04

0-O026

71. 26. 31-44

92-89

2 08

93-94

72. 26.

22. 53. 21-49

94-50

122. 47. 25-38

9394

9- 33-

38-53

91-55

6. 51.

5878

j

a3 -6*

'

I

...

O'OO O'OOI I

I

+0-003 +O-OO4

278

;

96-17

72. 30. 42-72

93-18

0-0016

60. 49. 58-66

0-0016

60. 50. 17-80

95^9 9373

6. 1

-09

93 '5

j

72.

1

o-oo

12-587 +0-387 606!

+o

261

o-oo

+12-682 +0-389 12 698 +0-368 +12-719 +0349

+0-033

+12-785 +12-800 +12-813 +12-834 +12-845

+0-226

+ j

3-1410

+o

...

i

t

-O-OO4I

j

8. 38.

Mali

2533 2534

Proper Motion.

1223

Piazzi VIII. 128

2521

I

1222

2513

2518 2519

Annual

1890-0.

;

2508

25U

Annual

Mean

iSio.

2502

2504

MeanN.P.D.,

Proper Motion.

1890-0. to

{liii}

+0-378

+0376 +0-612 +0-265

+ I-O2I + 1-289

+12-882 +12-882 +0-374 +0-402 +0-033 + 12-892 +0-402 +0-033 +12-908 +0-374 |

j

i

2536 2537

2538 2539 2540

1470 I

11

1243 ...

|

Groombridge 1470... 6 "8 Hydrse ^3-8

8. 40.

40-224

91-86

2

8. 40.

57-002

93-05

56

Lacaille 3503

8.41.

3-718

94-67

3

Lalande F. 1355

7-6

8.

41.

6-779

96-02

i

4'4*

8. 41.

10-698

96-23

3

D.+i 7 No. 19399-3 Lalande 17333 6-5*

8. 41.

37-615

93-24

4

8. 41.

44-642

88-48

3

12 Hydrse

1244

5-8*

B.

2541

2542

2545

W. B. (2) VIII. 10067-5 Groombridge 1471... 6 '8 B.D. +17 No. 19439-3

2546

Lalande F. 1347

2543 1471

2544

2547

1248

13

Hydra

7-0

No. 19459-5

B. D.

+17

2549

B. D.

+i7No.

19469-5 No. 19479-5

4

4i- 53-I94 '

p4'3*j

2548

B.D. +17

8'

5

+ 10-0630

+ + + + + +

3-3820

0-0117

+0-0007

42. 36-084

96-29

+"'53

93-80

6

+ + + +

3 3

42. 59-907

92-70

4

3-30

95-99

8.

45-54

96-29

73-

5-

18-83

IO8. 21. 20-22

51.

i

93-18

8. 18.

103.

72. 12.

4

89-16

9467

0-0287 o 0119

93-I9

j

114. 59. 17-05

0-0122

42. 20-331

42. 52-999

93-59

3'399

5

42. 38-504

91-64

17.

3 8887

93-93

j

0-0006+0-0005

2 7349

41. 54-473

42. 36-378

0-7423

28344

40 47

83. 10. 41 61

19.

0-0135

3-3882

9

1-0644

3-I835

0-0069

I

3'3867 j

3-3920

I

'

3-3930

0-0119 O-OI2I O-OI2I

2'94 0-6 5

93-23

72. 43. 41-49

93'!9

15.

6. 50.

0-0026

88-48

11-48

9348

96-29

83- 45- 2 3'29 72. 47. 12-41

93' 18

72. 29. 52-38

89-16

72. 26. 15-81

8849

2522. The magnitude of tliis star is taken from the Southern Meridian Plwtometry.

2533-2534- These stars form the pair 1. 1268.

2 537- This star is the principal star of a pair, and was itself found to be a close double

by Schiaparelli.

+0662

+12-934 +12-953 +12-961 +12-964 +12-969

+0-350 +0-023 +0-283 +1-114 +0-310 +0-009

+12-999 +13-007 +13-016 +13-017 +13-046

+0-370 +0-298 +0-372 +0-426 +0-370

+13-063 + 1-270 +13-063 +0-347 +0-021 +13-067 +0-369 +13-082 +0-369 1+13-090 +0-369

{liv}

No.

SECOND TES-YKAK CATALOGUE OK STARS FOR 1890-0,

FKOM OBSERVATIONS AT THE EOYAL OBSERVATORY, G-REENAVICH, 1887 TO 1896.

No.

{Ivi}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ivii}

{Iviii}

m>,

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FEOM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{lix}

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

No.

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixi}

{Ixii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixiii}

{Ixiv}

No.

SECOND TEN-YEAR CATALOGUE OK STARS FOB 1890

0,

FKOM OBSERVATIONS AT THE EOYAL OBSEKVATOKY, GREENWICH, 1887 TO 1896.

No.

{IxV}

{Ixvi}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE KOYAL OBSERVATORY, GREENWICH, 1887 TO

No.

189(5.

(Ixviii}

X<>.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FEOM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixix}

{Ixx}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxi}

{Ixxii}

No.

SECOND TEN-YEAI; CATALOGUE OF STARS FOR 18900,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{Ixxiii}

{Ixxiv}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxv}

{Ixxvi}

No.

SECOND TEX-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 189G.

No.

{Ixxvii}

{bcxviii}

No.

SECOND TEN-YEAR CATALOGUE OF STAKS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxix}

{Ixxx}

No.

SECOND TKN-YEAK CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxxij

{Ixxxii}

No.

SECOND TEN-YEAR CATALOGUE OF STABS FOE 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxxiii}

{Ixxxiv}

No.

SECOND TEX-YEAU CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxxv}

{Ixxxvi}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR

1890-0,

FKOM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{Ixxxvii}

{Ixxxviiij

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1S90-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0.

fat

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1890.

No.

{xci}

SECOND TEN-YEAR CATALOGUE OF STABS FOR 18900,

iNo. i

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{xciii}

{xciv}

No.

SECOND TEX- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{xcv};

{xcvi}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{xcvif}

(xcviii}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOE 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{xcix}

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

No.

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

So.

{ciii}

{civ}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cv}

(cvij

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cvii}

{cviii}

'NO.

SECOND TEN-YEAK CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1S9G.

No.

{ex}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR

1890-0,

FKOM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxi}

{cxii}

So.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

"to

It No.

.Sj y,

'755-

{cxiii}

|cxiv}

;

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FKOM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxvj

(CXVI

No.

SECOND TEX- YEAH CATALOGUE OF STABS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{t-xvii}

{cxviii}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{cxix}

{cxx}

No.

SECOND TEX-YKAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{cxxi}

{cxxii}

No.

SECOND TEX-YEAK CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

(cxxiii)

{cxxiv}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxxv

j

{cxxvi}

No.

6151

6152 6i5J 6154 6155

6156 6157 6158 6159 6160 6161

6162 6163 6164 6165

6166 6167 6168

6169 6170 6171

6172

6i73 6174 6175 6176 6177 6178 6179 6180 6181

6182 6183 6184 6185

6186 6187 6iSS

6189 6190 6191

6192 6i93 6194 6195

6196 6197 6198 6199 6200

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxxvii}

{cxxviii}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxxix}

{cxxx}

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE KOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxxxi}

{cxxxii}

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE EOYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{cxxxiii}

{cxxxiv}

No.

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

(cxxxv

J-

{cxxxvi}

SECOND TEN-YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

No.

{cxxxvii}

{cxxxviii}

No.

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0,

FROM OBSERVATIONS AT THE ROYAL OBSERVATORY, GREENWICH, 1887 TO 1896.

{cxxxix}

{cxl}

SECOND TEN- YEAR CATALOGUE OF STARS FOR 1890-0.

UNIVERSITY OF CALIFORNIA LIBRARY

BERKELEY Return This book

is

to desk

from which borrowed.

DUE on the last date stamped below.

ASTRONOMY LIBRARY

LD 21-100m-ll,'49(B7146sl6)476

Yff

701273

1-OV\

.

UNIVERSITY OF CALIFORNIA LIBRARY

Q2476

aaBffiigi^^

GEEENWICH SECOND TEN-YEAE CATALOGUE OF 6892 STAES FOE 1890.

Appendix

II. to

Greenwich Observations, 1898.