Visibility of Luna and Lunar Crescent

Tb v.lu.t of A's, B't .rd C'! 6. l} {oi.t nds tt giE bv Mo.u!
(M6n, l9S, A!0.odtr-Itr, !P. 4lS-421). Fidlv lh. t lbc.otic ldlidt of th' E ib it
l0'
(26.r1)
$.Fl:
For lElioc.dric .lisl&e of th. E|nb
&-X,i"6!p"+c,r J
zt2 t
xr - I,r,6lp" +c"'J
(2.6.15)
(2.6.r6)
(2.6.17)
nt
13 = t,r"co't +c"' " J
(2.6.rt)
t0,
h=>an(fr]\B,+c{
(2.6.19)
)
lo/
xr = t,."co4p" +c"' I
(2.6rI))
19 l
x, = t,,r" o.[8i + c,' ]
TIE vds of 4.. B's !d C" b. lb eorlr Ei6 & tih b, M6!
(Mc.q, 199E, Aprcndix-lu, pp. 4l E-421). Fi!.lly tlE helio@tric di!l&c. of th. Elnh
ZL,r
" = ''id,
Q.62t)
A!" Bs lnd C! N all in hdiM for looSin|d! , a|(l ldltt|d. t B6 od Ct c in ttdieE
.d A! i! .*!doiql uitr tu Llio.ldtc diaec X.
51