Visibility of Luna and Lunar Crescent

200
F 180
fi reo
3ro
Era
i roo
o80
i;@
JM
=ao
0
20 30
E mno
tig- 5. | ,2: Crlgn Lcogll! tr' vdi.Ii@ dE ARCV
Tlr! Fi8 5 1 2 slD{! lhai lh. nbdioel ctdid bdwen ct!*4t lcntlh
'd lhc
ctdgltion h not snolh s Eporr.d bv sd|Itrcr on {E b$i! of H@k''t mdcl Th'
tui! r.rlds fd tl 5 N (i) dE cr.rc.nt hngth ha to bc tff"t'd bv dE ElihMoon
dist ncc .! cl'in d abos (ii) 0F dttdgbdic n!td4' cloe ro lqizd trN|l tfrecr li'
cr$ent losrh., cl.imcd bv McN.[v ald Silrd MoEov{ v'rv wi'lc cle
'ot! ftal
c invilibte dn lo $.it d4 vicitritv qftb $t hori4o mull mt v|tilh $ddolv for s
invisiblc crcsc.nr the elongaiion mv ba ttiSc $d nult not h'r'' as lcngh (i3 msl'
dt b. i isiblc) !.dding to cLi$ of scn*&t Ttt invisibilitv of t eidt '!l*al
!t
de to ii! clo..n6 io lFdzon (sd[ ARCV) Ho*E' sftn dft$L diiod' (ARCV)
$e rnc G..nt 3lEI bc d!ibl.. Ot <ftosnlid lnd cltir b tbai for r sw' of
rrn (sfrcidt) $idlh tlt stving tud' (ARCV) mud clN lo dtc4" dt ldgft of
.le.nl fron nt mdinwn (al DAZ = 0) 10 iB minimun (terc lcnr$ vh'n itt {-valu' is
h.low limils of !tuio!) sooulv dd iot sdltolt' b nE $din'd 69 5 12 odlv dto*
obsflllloB .rc coNidctld tri.n lh' d!€c'!t M cltimcd b h!rc b'@ i"n or [E
cr.!c.d Loglt i! c!a!.bla
lEr