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SYNOPTICAL TABLES.
347
JUPITER'S SATELLITES.
No. Sidereal
Revolution.
Distance.
Jupiter's
radius
= 1.
Orbit
inclined to
Jupiter's
equator.
Diameter
in miles.
Mass.
Jupiter
=1
Apparent
Diameter
from
Jupiter.
  d. h. m. s.   °    
1 1 18 27 23 6.048 0 0 7 2436 .000017 31 11
2 3 13 13 42 9.623 0 1 6 2187 .000023 17 35
3 7 3 42 33 15.350 0 5 3 3573 .000088 18 0
4 16 16 32 11 26.998 0 0 24 3057 .000043 8 46

[1] (Mean longitude of the 1st + twice mean longitude of 3d) 3 times mean longitude of 2d is always = ,

180°
  1. In consequence of this remarkable relation, the 1st, 2d, and 3d satellites can never be eclipsed all at once.

SATURN.
Volume (Earth's = 1), 772
Mass (Earth's = 1), . 101.364
Density (Earth's = 1), .131
Diameter (Earth's = 1), 9.022
Diameter— — — in miles, 75.070
Diameter— — — apparent, mean, 17″.1
Diameter apparent— — — minimum. 15″.0
Diameter apparent— — — maximum. 20″.0
Gravity (Earth's = 1), 1.09
Gravity— — — bodies fall in one second, in feet, 17.6
Light and heat from Sun, perihelion (Earth's = 1) .0123
Light and heat from Sun— — — aphelion, .0099
Light and heat from Sun— — — mean, .0111
Polar less than equatorial diameter. 1-10th
Distance from the Sun, mean, in miles, 906,205,000
Distance from the Sun— — —, (Earth's = 1), 9,538,850
Distance from the Sun, in miles, — — — maximum, 10,073,270
Distance from the Sun, in miles, — — — minimum, 9,004,422
Eccentricity of orbit (semi-axis major = 1), .0560265