Moon
Callisto
The most heavily cratered surface in the Solar System. Geologically dead, an ancient surface ~4 billion years old.
| Type | Moon |
|---|---|
| Parent body | Jupiter |
| Radius | 2,410 km · 0.378 R⊕ |
| Mass | 1.076 × 10²³ kg · 0.018 M⊕ |
| Mean density | 1.83 g/cm³ |
| Surface gravity | 1.24 m/s² · 0.13 × Earth |
| Escape velocity | 2.44 km/s |
| Rotation period | Tidally locked (always shows the same face) |
| Orbital radius | 1,882,700 km (Jupiter) |
| Eccentricity | 0.007 |
| Orbital period | 16.7 days |