Visibility of Luna and Lunar Crescent

ranlAt =
c6(Ir)s,,{t) rz,(d)co{l)
(2.8.4)
si,(r) = sr,(c)si'(6) + c4(d)ca(t)c,r(fl)
(2.8.t
And adjusi.g for lhc rciacdon 6d $e heigh of $e obFNd's l@aiio. above *. Id'l
rbc topoentic @oilinares (,r,,r")ed (,i,,7t,) of the Moon dd fte Sun. esFclivtrv
In alnost all lhc nodels for cdlicst m@mid ins $c ancidl d w'll ts ibe nod'm'
ln. dir@. of eim hs (DAZ = lA,-A-1.
@lled El.tive @'ihuth) ard thn of
aldrudB (ARCV - ," - t.. cdl..l m of lision) d shoM in rhe lisr I, 'r
the iimc or
loc.l 3uEl T, sd/or al lhe b$l Tb Play a vilil ole:
As ihe dgulu sePar.tions invol!€d b.iwen $. Sutr md lh. lunar cesenl at
$6. dnes @ sdaU, wi6ou1 dEh mt th. e of lighr (ARCL) h giEn bv:
(2.8.6)
Wh.@ for larSct ugl6 or moF ffi.rc Gults th. d of lieltr should b. eldl.Ld
ARCL = cdr(co(r-)co{rr,)cd(tra - s,'(r.)si(4)) (2 E ?)
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