130 GIUSEPPE (JORI 



Si può ritenere 



D = [9,9977887.671— 10]=0,0949213880. 



Per un'approssimazione maggiore si hanno le forinole : 



D = l- [8,1254404.106— 10] sin 2 B+[5,6488208— 10] sin 4 B 

 — i _ 0,005085076513+0,000006464501=0,994921387988, 



D = 0,986695803051+[8,1225320.511— 10] cos 2 B+[5,6488208— 10] cos 4 B 

 = 0,986695803051+0,OOS208512S87+0,000017072051=0,994921387989, 



D = 0,993336764717+[7,8229586.608 - 10] cos2B+[5,0467608 -10] cos 2 2B 

 = 0,993336764717+0,001583901798+0,000000631465=0,994921387980, 



D = 0,980695803051 + [8, 1196236.915— 10] cos 2 p+[6, 1201254— 10] cos 4 |3+ 



+[4,06948—10] cos 6 (3+[l,991— 10] cos 8 p+... 

 = 0,986695803051+0,008174510215+0,000050792721 + 



+ 0,000000280537+0,000000001452 

 = 0,994921387976, 



D = 1 — [8,1283487.702 - 10] sin ! p + [fi, 1317588— 10] sin 4 £— 



— [4.08402— 10] sin 6 [i+[2,008— 10] sin 8 p — ... 

 = 1 _ 0,005098038478+0.000019492498— 



— 0,000000066248+0,000000000211 



= 0,994921387982, 



D = 0,993314491218+[7,8229489.315— 10]eos2p+[5,5238724-10]cos 2 2p+ 



+ [3,17364—10] cos 3 2p+[0,795— 10] cos 4 2p+... 

 = 0,993314491218+9,001604949766+0,000001944900 + 



+ 0,000000002095+0,000000000002 

 = 0,994921387981. 



Riterremo, come più approssimato, il valore 



D = 0,994921387980. 



