Sizes
The Saturnian moon system is very lopsided: one moon, Titan, comprises more than 96% of the mass in orbit around the planet. The six other planemo (ellipsoidal) moons constitute roughly 4%, while the remaining 55 small moons, together with the rings, comprise only 0.04%.
| Saturn's major satellites, compared to Earth's Moon | |||||
|---|---|---|---|---|---|
| Name |
Diameter (km) |
Mass (kg) |
Orbital radius (km) |
Orbital period (days) |
|
| Mimas | 396 (12% Moon) |
0.4×1020 (0.05% Moon) |
185,000 (50% Moon) |
0.9 (3% Moon) |
|
| Enceladus | 504 (14% Moon) |
1.1×1020 (0.2% Moon) |
238,000 (60% Moon) |
1.4 (5% Moon) |
|
| Tethys | 1,062 (30% Moon) |
6.2×1020 (0.8% Moon) |
295,000 (80% Moon) |
1.9 (7% Moon) |
|
| Dione | 1,123 (32% Moon) |
11×1020 (1.5% Moon) |
377,000 (100% Moon) |
2.7 (10% Moon) |
|
| Rhea | 1,527 (44% Moon) |
23×1020 (3% Moon) |
527,000 (140% Moon) |
4.5 (20% Moon) |
|
| Titan | 5,150 (148% Moon) (75% Mars) |
1,350×1020 (180% Moon) |
1,222,000 (320% Moon) |
16 (60% Moon) |
|
| Iapetus | 1,470 (42% Moon) |
18×1020 (2.5% Moon) |
3,560,000 (930% Moon) |
79 (290% Moon) |
|
Read more about this topic: Moons Of Saturn