[8o] 
The Difiance and Period of the jirfl Satellite. 
The firft or innermoft Satellite of Saturn, by the Obferva- 
tions hitherto made, is never diftant from his Ring, above 
two thirds of the apparent length of the fame Ring, which 
we take for the meafure of the diftances oi: thefe Satellites: 
and it makes one Revolution about him, in one day, 21 
hours and 19 minutes. Wherefore in lefs than two dayes 
it makes two Conjunftions with Saturn^ the one in the up- 
per part of his Orbe, and the other in the lower part ; and 
the Ring taking up the greateft part of the Diameter of the 
Circle, wherein this Satellite makes its Revolution, thefe 
Conjunftions are of along continuance, in refpeft of the 
whole Revolution, it being 8 hours and half in paffing the 
length of the Ring, which at prefent hides it every day for 
fb long time ; and longer too, becaufe it is very hard to be 
diftinguifhed, when it is very near the Ring. 
This happens particularly for thefe two or three years, 
when the Pofition of the Ring, in refpefl: of the Earth, being 
very Oblique, it appears very narrow ; and the Circle of 
this Satellits Orb being nearly in the fame plain with jt, 
they appear very clofe togather. In the following years 
when the Ring and the Orhs of thefe Satellites fhall be more 
open, there will be a greater diftance in Latitude between 
this SateSite and the Ring, and it may be feen both above 
and below thQ~ J/if^, w4iich at prefent cannot be. 
Thefe Conjunctions of fo long duration hapning often at 
the times moft proper to obferve Saturn^ have frequently 
hindred the feeing of this Satellite^ and particularly before 
we had found the Rules of its Motion, fo as to be able to 
prepare to obferve it, at the times when it was far from its 
Conjunction. And feeing one Con jundion begins 14 hours 
after another is finifhed, and that each lafts 8 hours and 
half; whenever we hapned to obferve after the beginning of 
a Conjunction, and. continued the following days to_ obferve 
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