PREDICTION OF OCCULTATIONS. 



31 



Calculatian of the Times of Immersion and Emerdmi, etc. 



(Table, page 27, Arg. (p) 

 log^sincp =: 



(Table, page 27, 



log j5 cos (p ^ 



logrcos<p'sin(7t ■ 



log r cos <p' cos ( /t — cT) = 



logrt^sinZ> = 

 logiA = 



rsintp'oosZ) — h&vaD = 



q — V ^= 

 a = 



p — u = 

 2' — v' ^ 

 p' — u' ^ 



log -4 



logsiucp 



logrsin<p' 



log cos Z* 



logrsin<p'cosZ> 



Arg. (|)) log 5 



log cos <p 



log>-cos(p' 



log sin (Ji — rf) 



— d) ^= \ogu = log a 



log cos (A — d) 



logi 



log A 



log a A 



log sin Z) 



log h sin D 



logi)' 



logw' 



rsintp'cosZ) 



isinZ* 



m cos 31 



msmM 



9 



ncosiV 



. P' 

 jisinA" 



log w sin J)/ 



logmcosil/ 



log tan Jf 



log cos if 



logm 



log n sin A'" 



logMCOSiV 



log tan iV 



log sin A?" 



logji 



log-^ 



9976 



7332 

 7308 



7130 

 0005 

 9248 

 9253 

 9S59 

 8812 

 6321 



5574 

 4192 

 3004 

 4479 

 0053 

 7483 

 9766 

 5164 

 1013 

 6177 

 8050 



1873 

 7607 

 7871 

 0264 

 0560 



1659 

 2219 



0948 

 5622 

 4674 

 4216 

 2725 

 1491 



9957 

 2768 

 6697 

 3462 

 3235 

 9558 

 7139 

 5629 



Immeksion : San Diego Mean Time = 



Immersion Angle from North Point ^ 

 Immersion Angle from Vertex ^ Q-t- P =: 



M 



N 

 M-N 



270° — iV 



For Immersion, 270°— A" — vJ/= Q 

 log sin (71/— A) 



r?7isin(il/— A) 



\ogk 



log cos 4/ 



log sin 4/ 



log k sin ■^ 



log 



m%m{M — N~) 



k 



k sin 4/ 



log(i) 

 log cos (i)/— A) 



■log — eos(i/— A) = 



For Immersion, (2) — (i) 

 For Emersion, (2) + (i) = 



M 4- t^ u' 



w-i- t^u' 



log (it -I- «, «') 



log(«-(- <i/) 

 log tan P 



Emersion : San Diego Mean Time 



(Eeduced to hours and minutes) 



(Keduced) 



35i°58:5 



115 24.0 



236 34-5 



270 0.0 



154 ^(>■o 



125 26.0 



29 10. o 



- 9 

 -*- 9 



- 9 

 9 



- 9 

 + 9 

 + 9 

 -^- 9 

 -^- 9 



- 9 



- 9 

 + 9 



log(2) 



(0 + 



(0 + 



h — 



log*. — 



log <, v' 



t^v' 



V 

 V -t- <, Z)' 



9214 



4350 

 7632 



91 10 



3460 



7'39 

 6321 

 7410 

 5629 



3°39 



2014 

 4286 

 2272 

 6300 



3564 

 9766 



3330 

 7483 

 1047 

 0127 

 6177 

 6050 

 021 J 

 7607 

 7822 



8933 

 7818 



1115 



T-d 



d-t-t^ 

 P 



15 46.6 

 — 13.6 



15 33-0 

 -52° 16:5 



- Q 



r 



29 10. 

 336 53-5 



d-i-t. 



-♦- 37:8 

 16 24.4 



