|
Largest moons of the planets
(diameter over 1,000 km)
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|
Moon
|
Planet
|
Mean
diameter (km) |
Mean distance from centre of
planet
(103 km) |
Orbital
period (days) |
Inclination of orbit (deg.) a
|
Eccentricity of orbit
|
Mass
(planet = 1) |
Density
(water = 1) |
Geometric
albedo |
|
Ganymede
|
Jupiter
|
5262
|
1070.4
|
7.155
|
0.17
|
0.001
|
7.80 x 10–5
|
1.94
|
0.43
|
|
Titan
|
Saturn
|
5151 b
|
1221.9
|
15.945
|
1.63
|
0.029
|
2.37 x 10–4
|
1.88
|
0.2
|
|
Callisto
|
Jupiter
|
4821
|
1882.7
|
16.689
|
0.31
|
0.007
|
5.67 x 10–5
|
1.83
|
0.17
|
|
Io
|
Jupiter
|
3643
|
421.8
|
1.769
|
0.04
|
0.004
|
4.70 x 10–5
|
3.53
|
0.63
|
|
Moon
|
Earth
|
3475
|
384.4
|
27.322
|
5.15
|
0.055
|
0.0123
|
3.34
|
0.12
|
|
Europa
|
Jupiter
|
3122
|
671.1
|
3.551
|
0.47
|
0.009
|
2.53 x 10–5
|
3.01
|
0.67
|
|
Triton
|
Neptune
|
2707
|
354.80
|
5.877 (R)
|
156.83
|
0.000
|
2.09 x 10–4
|
2.06
|
0.76
|
|
Titania
|
Uranus
|
1578
|
436.30
|
8.706
|
0.08
|
0.001
|
4.06 x 10–5
|
1.72
|
0.27
|
|
Rhea
|
Saturn
|
1529
|
527.10
|
4.518
|
0.33
|
0.001
|
4.06 x 10–6
|
1.23
|
0.6
|
|
Oberon
|
Uranus
|
1523
|
583.50
|
13.463
|
0.07
|
0.001
|
3.47 x 10–5
|
1.63
|
0.23
|
|
Iapetus
|
Saturn
|
1469
|
3560.8
|
79.330
|
7.57
|
0.028
|
2.8 x 10–6
|
1.09
|
0.5/0.05
|
|
Charon
|
Pluto
|
1186
|
19.41
|
6.387
|
99.1
|
0.00
|
0.125
|
1.85
|
0.37
|
|
Umbriel
|
Uranus
|
1169
|
266.00
|
4.144
|
0.13
|
0.004
|
1.35 x 10–5
|
1.40
|
0.21
|
|
Ariel
|
Uranus
|
1158
|
190.90
|
2.520
|
0.04
|
0.001
|
1.55 x 10–5
|
1.67
|
0.39
|
|
Dione
|
Saturn
|
1125
|
377.40
|
2.737
|
0.00
|
0.000
|
1.93 x 10–6
|
1.47
|
0.6
|
|
Tethys
|
Saturn
|
1073
|
294.70
|
1.888
|
0.17
|
0.000
|
1.10 x 10–6
|
0.96
|
0.8
|
|
a Orbital inclinations are given
relative to the planet’s equator, except for
the Moon which is given relative to the ecliptic.
The Moon’s orbital inclination relative to
the Earth’s equator ranges from 18.28 to
28.58 degrees; it reaches its maximum inclination
every 18.6 years.
b Diameter of solid body; diameter at
cloud top is 5550 km.
R = retrograde.
Sources: Diameters, densities,
and albedos from JPL Solar System Dynamics group; other data from The Astronomical Almanac.
Table last updated 2006
September.
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