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Again, Nev. LI. 16^ i$*. thi $ Satellite ai Satum was on bis South-side,foe Perpendicular on the Line of the Anf.t feli on the Middle of the darieSpace of the Western Ansa, and the fame Niglit 19h oo f , the Perpendicu-Jar fest precisoly on the Center of Saturn, and the Distance therefronj wasIbmewhat lest than one Diameter of the I \ing. By thi» It was evident thattheSateUite was in Apogao.

I oWeryed it In Apogao again onthe 14^ of Jan. 1683. at 8^ ocfp.m.the Perpendicular on the Line of the Anst feil exactly on the Weisem LImb9s the Globe of Saturn, and at 9^ p. m. the Lid Perpendicular feil wirb-in the Globe more than half way to the Center,and the Distancefrom the Lineof the Atjfe towards the Souih, seemed much about one Diameter of tbeKing.

Lastly, Feb. - 1683. 8** l O 1 . p. m. it was again in Apog.ca, and I couJdby no means dilcern towards which fide it inclfned molt, nor whether theTransverso Diameter of the RJng, or the Distante of the Satellite therefrom,were the greater; so that at that time it was preeisoly Apogaon.

To compare with these, I choso two out of thosoof Hugent > which seemedthe most to be confided in; the first madc 1659. March 14. st. n. ix^ oc 1at the Haguc', when the Satellite appeared about one Diameter of the KJngunder Saturn, but it was gone so far to the Wellward, that he concluded,that about 4 Hours beiore, or 40' at London, it had been in Perigxo.

Again, March n. 1659. IO* 1 45'. the Satellite was a whole Diameterabove the Line of the Anst, and the Perpendicular thereon feil nearly uponthe Extremity of the Eastern Anja.

By the First of my Obsorvations it appears that the Satellite was in Pcri-g.co i68x. Nov. 13. iy* 1 00'. circiter, at which time Saturn was 30* 190 39/from the first Star of Arie: in the F.cliptic\, but the Earth reduced 'to Saturn sEtjuinoclial, and the Satellite was 9 S X30 aji^c y\ And Marh 4.16y9,7" 40'. Saturns Place m the Eclipticis was 6s co 41s but the Earth redu-ced, and conlequently the Satellite, in 1 i s 2.80 18'. a Prima Stella Arietis.The Interval of Time is 8655 Days, 9 h xo'; in which the Satellite hadmade a certain Number of Revolutions to the FixtStars,andbesides 9* 15° x8'.or 195 Degrecs x8', whoso Complement to a Circle 64° ix! is x Daysxo* 1 36' Motion of the Satellite, according to Ilugcns. So that 8658 Days5^ $ 6 ', or 1x467876 Minutes of Time, is the time of sorae Number ofintire Revolutions; and dividing that Interval by 15 Days xx* 1 39', orxx9s9^ (the Period of Elugens ) the Quotient 54z shews the Number ofRevolutions; and again dividing 1x467876' by 54z, the Quotient 1x9611smin. or iy days, ix* 1 41' 6". appears to be the true Time of this Satel-iists Period. Hence the Diurnal Motion will be xx° 54' 38" 18"', and theAnnual besides ix Revolutions io s xc° 43'. Having made Tables to thisPeriod, I found that in the Apogaon Observation of Hugens, the Satellite wasabove 3 Degrees faster than by my Calculus, and that in the three other Ob-sorvations ofmy own, being likewiso in the Superior part, it was 1 1 Deg. flowerthan by the säme Calculation. Now ’tis evident that these Differences muftarisofrom some Ecccntricity in the Orbite of this Satellite, and that in Mar. 16 f 9 ,

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