|
Largest moons in the Solar System
(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
|
5150 b
|
1221.9
|
15.945
|
0.3
|
0.029
|
2.37 x 10–4
|
1.88
|
0.2
|
|
Callisto
|
Jupiter
|
4821
|
1882.7
|
16.689
|
0.19
|
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
|
354.76
|
5.877 (R)
|
156.87
|
0.000
|
2.09 x 10–4
|
2.06
|
0.72
|
|
Titania
|
Uranus
|
1578
|
436.30
|
8.706
|
0.08
|
0.001
|
4.06 x 10–5
|
1.66
|
0.27
|
|
Rhea
|
Saturn
|
1529
|
527.07
|
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
|
1.56
|
0.23
|
|
Iapetus
|
Saturn
|
1471
|
3560.9
|
79.330
|
8.31
|
0.023
|
3.18 x 10–6
|
1.08
|
0.5/0.05
|
|
Charon
|
Pluto
|
1210
|
19.57
|
6.387
|
96.1
|
0.00
|
0.116
|
1.68
|
0.37
|
|
Umbriel
|
Uranus
|
1169
|
266.00
|
4.144
|
0.13
|
0.004
|
1.35 x 10–5
|
1.46
|
0.21
|
|
Ariel
|
Uranus
|
1158
|
190.90
|
2.520
|
0.04
|
0.001
|
1.56 x 10–5
|
1.59
|
0.39
|
|
Dione
|
Saturn
|
1123
|
377.42
|
2.737
|
0.03
|
0.002
|
1.93 x 10–6
|
1.48
|
0.6
|
|
Tethys
|
Saturn
|
1066
|
294.70
|
1.888
|
1.09
|
0.000
|
1.09 x 10–6
|
0.97
|
0.8
|
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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 2011 January.
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