Visibility of Luna and Lunar Crescent

lh. €floft e nol s su@esstul s lh. Babylonia cdlcnon ed Lud RiFnc$ Law
coBider.d in the prelioN two articl€s 6 fd s lb. nMbq ofdeviorion fon the law in
the ob*tued @seni d€ @ren.d.
Anolher eforr ofgEar significance rnar h found in tir.6tuE is based on rh€ wft
of Schoch ( I93O) and h known d lndie Melhod give. in the Exp tnlnion ro The trdian
Astronohi.at Ephenetis , t^ ttlh n€lhod dr ba5ic dala u!€d rs givs hee il lablc no
3_4.6,
A leasr square quadralic polynoniat fincd b rhis dala yields lhc fo owing Etaionj
A nC t = l0 t74l - u Ot 3l)DAZI _ O.@aj DAZI (1.4 r r)
UsinS lhBpotynomiaI od rhc condirion dur rhecre*enr $outd be \6rble ii
/ RC v >1e it4i - o.ot lTDAzl_ o.@st DAZ. (t.4.12)
@d applied il to dara *l
Pc*nled in fis. no.1.j.8. For 6is figuE ,// Bed G
Ihrs hrl( $e Esutrr ohained aE
''visibilily peamelef defined sl
\ =(ARCV _ lt}.3:,43 _ O.o137DAzl _ o.!n97 D,12..)) (3.4.1:l)
,,,,,.i." "" -O 19 our 196 porir.\e sishrinss Dar devidrc rbn l,ll. condi on
TIs rill rhe hrer hatfofrhc 2Od c.otury rh. Indiao n.rh@ ws consid.red to be rhe besr.
Horck in vi€w of rhe analysis of Babylonian cnlcrion and the Lund Ripen s Law
exploFd 6d prsenred in this voik. dot w.d rhe Indim mehod rs s sle6sful in |.ms
l2l