AN ELLIPTICAL ORBIT. 25 



The Sun's mean anomaly 120° 50' required the true anomaly 

 and equation. 



120° 50'= 2.10893951 

 — X zz .0167923 



R = 2.09214721 

 90°= 1-57079633 



3.09439694= 120* o' o".2fi 



Comp. 



