136 DETERMINATION OF ELLIPTIC ORBITS. 



Components of @ 4 Components of @ 5 



For control only : 



75 = 74 



_/Q a 4 2 + /3A + 74720 



~ P4 "" Q 2 P2 



S 2 



72 



R 



S 



tan 

 tan 



RS 



The computer should be careful to use the corrected values of A v 

 (See VIII.) Trifling errors in the angles should be distributed. 



For control : 



p p 



r/v 

 t * o 





ecos 

 tan 



i , x - v 

 2oosJ(t; 8 % 



e = 



l-e 



cos v z = 1 



^2 



p 

 a=~- 



Direction-cosines of semi-major axis. 

 , _ COS V 2 Sin V 2 



(j "" ~ da ~~" ~ Otc 



a & o 



cos v 9 sin % ,, 



. /< . /< 



9 P2~ -T P5 



& 2 6 5 



cos V 2 sin i> 2 



, y _ y 



o o O 



