Key facts
- Mean diameter
- 5,268.2 km
- Mass
- 1.48 × 10^23 kg (0.0248 Earths)
- Surface gravity
- 1.428 m/s² (0.146 g)
- Escape velocity
- 2.74 km/s
- Mean temperature
- -163 °C
- Rotation period
- 171.72 hours
- Orbital period
- 7.155 days
- Mean distance from Jupiter
- 1.0704 million km
Atmosphere
Negligible or extremely thin.
Composition and structure
Rock and ice.
Discovery and exploration
The only moon known to generate its own magnetic field; ESA's JUICE will orbit it.