Visibility of Luna and Lunar Crescent

5.
6,
1.
E.
10.
B€dTimeofvhibilily Tr
Age oflhe M@netTr AC€
Arc'ofvision
Relative AziDurh
ARCV
DAZ
Arcorlight(Elo!8afion) ARCL
Pbseofcqc.n P
Widlhofcrcs@nl w
A conputarioml stnlegy may be lo stad b, deternining $e tim. of Bidh of lhe
New Moon or conjlnctio. or th. Moon *ith the snn. For .ny plee on the slobe
deremirc rh. dm€ ot suner |har follos rhe timc of bidn of ncw M@n. For this monenr
conpute thc e€@entic .cliplic coorditulcs of both lte Sun aod $. Moon. Tlmfom
the* coodinat.s to lhe lGal horizonbl c@rdinates. Tbereby coFPute tnc LAC,lhe Age,
ARCL, ARCV. DAZ and the width W. The ddoih of all $6e computations shau bc
t.2
SIGNIFICANCE OF GEOGRAPHICAL LOCATION
Fo! $c pioblem of rhc .dli.st lisibility or the Ncw Cre$enr Moon $e
orientatiob ofthe paths of the Sun and the Moon Eladve lo mch othcr dM tlarile to lhe
hoizon h significdnl. They chatrgc scason lo seaon as \tll as year lo ,car a.d olso
depeod on thc latitudc of lhe place. Due 1o fte axial rctation of lhc lanh cvcrv object in
lhe sly appsr 10 hvel along a cidular palh (The Diuftal Patb) ext nding frcm ealcm
horimn ro thc $'eslm borircn. Thn parh lics in a plae pellcl lo th€ Plane of thc
equalo. Tlc obj*ts in ou sty sbos. delimtion is coNLnl (sld and other exd_$lar
sysreh objccq slw.ys remd. in a 6xed smallcircle in our 3ky with Norlh Ccleslial Polc
being ren Pole i.e. rheit diurnal palhs cE no( only 6xed bul lic in plan.s parallel to each
olh€r. Thc Plan. of the orbn of lhc ednh eund lhe Sun h inclined to lhe pla.e of lhe
Equalor .l s .ngl€ of eosd 21tr 26' 26" lhcefor tne deliMiion ot lhe Sun in ou tkv
vdi.s frch 230 26' 26" $nth ro 230 26' 26 nonh oY€r a y6. Thc declimtion ofrhc
Moon vdi.s frem aoDd 280 S5 south to 280 35' ;onn duting. llMlion penod Thc