Places of Saturn computed by Hansen's Formula. 299 



823 

 .*. mean error in former = — S, 823 produces — ■=— ^108" # 6 



9400 



= — 9"'51 error in Hel. long. 

 The accompanying table, which has been verified in se- 

 veral particulars, shows that A — H in longitude is nearly 



Table. 



addition of I ° to the epoch of— 2845"-8. . sin {Bg'—Vg + 246°..) 

 would nearly remove*. The differences in the latitude and log. 



* If the precession be taken as in Poisson's Mec. ii. p. 195 = 50"-2343 

 as on the moveable ecliptic, this would diminish the error A — H in long. 



