1|Page Husa:m form of Schaefer’s formula of Luna’s Crescent. Wψ=rcosψ(1-cosE) =WcCosψ Bψ=rFmCosψ(1-CosE)[(A)^2](R)^2 Bψ=Fm {1/(R)^2}Wψ Now according to Schaefer’s Reconstructed formula =سLog بب/ب = Log[ Bmoon/BReq] Let Bmoon=Bψ BReq= B0(Z) Now we get an other formula =سLog[ [WcCosψ((a^2)/(R)^2)Fm]/ B0(Z)] Now the Criteria is the same If 1< سVisibility is Certain 0> سVisibility is impossible 0<1> سVisibility is Probable Dedicated to any one who understands it.
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