32 



PREDICTION OF OCCULTATIONS. 



Calculation of the Times of Immersion and Mnersion, etc. 



(Table, page 28, Arg. 

 log ^ sin (p = 



(Table, page 28, Arg. 

 log S cos <fl = 

 log r cos (p'siu (Ji — fZ) 

 log r cos (|)' cos (A — rf) 



\oga\smD r= 

 log 6 A = 



!-fsin(jy-AO = 



log 



isin^J/ 



cp) log^ 



log sin ^ 



log;- sin Cp' 



log cos Z) 



logrsin<|''cosZ> 



cp) log 5 



log cos Cp 



logrcosiji' 



log sin (li — d) 



= logM = logrt 



log cos (7i — d) 



= log 6 



log A 



log a A 



log sin i) 



log 6 sin D 



logi;' 



logM 



logTOsinilf 



log m cos J/ 



log tan JW 



log cos if 



logm 



logKsin A'' 



logncosiV 



log tan A'' 



log sin N 



logn 



— l°gv 

 log cos (if— A") 



log sin (if— AQ 

 log/. 



logT 

 log COS xj/ 



log sin J/ 

 log/; sin \|/ 



log(i) 



9.9976 



-97332 

 -9.7308 



-9-9571 



-9.6879 



0.0005 



-9.9248 



-9-9^53 

 -9.7879 

 -9.7132 

 -9.8974 

 [-9.8227 

 9.4192 



-9-I3H 

 -9.6265 

 -9.4492 



1-8.7589 

 1-9.2419 



-7-73H 

 -8.6848 

 1-9.0476 



-9-9973 

 h8.6875 

 ►-9.6079 

 -8.2529 



-I-3S50 

 1-9.9996 

 1-9.6083 

 -9.0792 

 -8.8251 

 1-9.9990 



9-43 3 o 

 t-9.2525 



1-9.2515 

 1-9.9930 

 1-9.4280 

 1-9.8197 



rsimp'oosZ* — IsmD = 



q — V = 



a ^ 



p — u = 



g' — v' ^ 



p — u = 



rsintp'cosZ) 

 isinZ* 



9 



m cos if 



P — 



m sin M 



9' 



v' 

 ncosA" 



P' 



u' 



main A" 



M 



N 



M—N 



270°— A" 



4' 



For Immersion, 270° — A'' — vj/ = Q 



For Immersion, (2) — (i) = 

 For Emersion, (2) -f (i) = 



u-v-t, v,'= 



(0 



log*. 



logtt' 



log'i"' 



logt)' 



log <, v' 



ty 



coos 



csin C 

 log c sin C 

 lege cos C 

 log tan G 



.4874 

 .2813 

 .7687 



•7203 

 .0484 

 .5220 



- .5166 



- .0054 



- •°395 



n .0574 



- •o'79 

 I- .5800 

 I- .1746 

 h .4054 



l86°22' 



92 32 



93 50 

 177 28 



79 43 

 97 45 

 0080 

 .6603 

 6523 

 6683 

 8144 

 2419 

 0563 

 7589 

 5733 

 0374 

 73'3 

 1139 

 .6305 



7996 

 8641 

 9355 



-log— cos(if-Ar) = log(2) -t-7.9043 ^_^ 



(Reduced to hours and minutes) <, 



Immersion : San Diego Mean Time - • - - - - - - - T — d-^-t^ 



C 

 Immersion Angle from North Point = .........Q 



Immersion Angle from Vertex := Q -h O =: - - - - - - - - V 



Emersion : San Diego Mean Time ......... T — d-*-t^ 



16 i6.6 



— o 39.1 

 15 37-5 



— 40° 46' 



97 45 

 56 59 



• o 40.1 

 16 56.7 



