Visibility of Luna and Lunar Crescent

at the titu of lual su6.t shottd be g.ater than 2't hows
the su6el ohd the no6et thDuld be g.ot* than 12 tim
(l.l.l)
l2 rim. deBes is cquivslenr ro
;$ ofo hour or48 ninu$ (Brura I9??.llv4 le944
lto$ev4, il wd Fat@hi, Stephe$on and At'darghdlli who havc
'xPlorol
lh€
cflon5 of lhc Blbylonians dlsiv.lv &d have epon€d rnal eording to lhe histotiel
Eords of re* c.Mnl siSlftings ol PG Christie m lhe cderion attibured h
Babylonis is d ov€r simplificalioi (Fabohi.t al 1999) Ac@tding lo $en $udv oi
209 recoids of Posi{ve new cr€sceol 3ig} ing extdctd fom Babvloni&s Astronon'car
di&ies. the Babylonitus had succceded in ioduladng a lrulv mathem'lical lunar lheory
$hich ihey 6ed to pEdicl !&ious par@ele$ of lumr notion Unfortumtelv wrlhoul
presnline my iheorerical d€laih of Babvlonian eE lh'v appear 10 be
"ilicdl
aboul
Bluin\ slgscsion thar Babvlonia criterion was whar is mentioncd above (l l l)'
lnst€Ed.1hey clain that Babvlonian ctilerion wEs as Follo*s:
Tnc ies cEsce.r is een it
'' Elongutio, (ARCL) + nooe|st6't laE tine (Uc)
(3.12)
Even, rhis cdrerion is apon d on b6sis of the suee€stios ol Ncusebaud (Neue'ba@r'
1955) &d nol 6 a rcsult of ov d'$rip$on of a madehalcal lh'orv Ttev have
nehtioned two svst€ns of sol& moliors on *bich th€ lt@ rhsrv ol Babvlonids las
based, but hoq lh€ new rul€ they hav. attdbded to the Babvlonims wD drived al $ nol
giv6, They have gone on lo plesd .lifleant valucs fo! th' @nslul on lhe
'kh
h8d
;ideof(3.1.2) Th€se lalEs Engc fton 5 DiniDum of2loro a maximM ol23" lnlhe
p!€ent work we adofl fte followins as a bener critcrion alfiibutcd lo de Babvlo'ians as '
slss.sted by Fatoohi el .l:
79