Occultations of Stars by the Moon. 



341 



April 4. 0'^ 

 12 



5. 

 12 



6. 

 12 



hence 



5° 50' 21"-1 

 5 45 55 -8 

 5 42 26 -0 

 5 39 53 -4 

 5 38 17 -9 



+ 1-7 

 -0-1 



6. For the example given by Professor Encke, viz. the 

 occultation of 82Leonis, 5th of April 1830, we have from the 

 Ephemeris the right ascension of the moon on 



153°41' 31"-8| 

 159 31 52 -9' 

 165 17 48 -7 

 171 14 -7' 

 176 40 8 -1 

 182 18 26 -Of 



a = 168° 9' l"-7 

 i = +5 42 26 -0 

 c = -3 1-2 



d= +57-2 



e =s +0-8 



In the same manner we have for the declination 

 a = + 4° 52' 45"-55 

 b = — 1 48 44 -7 

 c = —2 33 -25 

 d = -M 1-7 

 e = — 1 -0 



a — 54' 12"-2 

 b = -7-0 

 c = +1 -8 

 Hence we derive for S*", 6'', 7'', 8*", 9'' mean time of Berlin 



and for parallax 



If we assume, agreeably to Encke, for the position of the 

 star A = 169° 14' 6"-C; D = + 4° 14' 4"-8, 



we obtain the following val ues of ^'■" ^'' ■ ~ — 



b 



— 1-71312 

 -1-18928 

 -0-66532 

 -0-14126 

 -0-38284 



+ 52384 

 + 52396 

 + 52406 

 + 52410 



and llicse vaiucijol ■ — -. — — '- 11 IL 



— 2 



— 6 



