( 4 11 )'
An.l6jj. Sept. ij 8h <)' 4o // . at Grcentvich, Mr. Flamßeed observed ths>Eirst Satellite to begin to Emerge ; that is 8* 1 ()' x6" . at London.
d.
h;
/ //
N. I.
N. II.
1677.
O
3
14. g A
zczS
102, y
Sept.
17
4
4 JZ
HZ
147, 7
Sept.
7
18 48
ziyy
248, 0
/Equat. I.
--
z6 11
Z44B
3
/Equat. 2.
'7
6
S - 37
x 73
zyo, g
-I-
0
1 3y
zzy, 4
Sunimora
H-
1
7 00
2-4' 9
Eejual Time
17
S
1 16
11) z6, z (2,
i?
/Equat ion
-I-
0
9
® in — y°,
. co' 1
Apparent T.
*7
8
10 41
Obseiv.
co
8
g zo
Error
I 21
An Immersion of this Satellite bemg computed aster the fame rnannef^ac* -cording to thde Tables, ought to have happen’d. /hi. HiSg. Nov. go.i6 h 5 ‘tJ 7/'. but I observed it at- 16 lx 48^ 40" to that the Error was»-
— i si'■
Again, M. Casini ofeserv’d an Emerson at Paris. An. 169g. Jan. 14^"' 10^**
40^ 28'' that ir, at London i e E go/ 4 5 ". Which- thde Tablesgive at ioh^go 7 59V. and -tbereforo the Error was no more.than -+■ 9//.
After this mannet I have compared thde Tables wich many goed and cer--tain Obfervations» and searce ever find them Err above g or 4 Minutos of;
Time; which Errors are exceeding finali in compari ton of. the ftiorc Time-thac’the Satellites have been di/covered.
In the Constrpction os the Tab!e, which shews the.H.;li Continuance, of/thefe Eclipses , the Semidiameter öf the Shadow of Jupiter is made by Casinijust 10 Deg, and. that of the Satellite gc/; and the Satellite’s Ajcending Node,-being luppofed in 1 y° of Aquarius , : at the End of this Century, ( that is-y y°
2:c/ before tlie Pcribclion ot Jupiter ) it will thence follow, that Nam. I. be—ing 116, or 7 . 102 , Jupiter pafies the Nodes of the Satellites Orb» and conte-'quently thde Eclipses ■ are Central, and of the.Greatest Duration. ButNum. I. being 2. 1 y, or 1481, the Satellite pafles the Shadow with the Crea- •test Obliquity,,vjy. z 0, y.y' frorn the Center, whcnce the S animor a becomesof,all the {hortest.
3. The Tables of the other g Satellites not being tb perfect or exact as of tbevthtr 5.thole of the. First, are here given insanother. Form. Tne Pericds ot-their Satellites.Revolutions to Jupiter s Shade areas follows.. 1 '