Callisto
Moon of Jupiter
Facts
- Mean diameter
- 4821 km
- Mean distance from the planet
- 1,882,700 km
- Orbital period
- 16.7 days
- Discovery
- Galileo Galilei, 1610
Callisto is the outermost of Jupiter's four large moons and the most heavily cratered object in the Solar System. Data from the Galileo probe in the 1990s suggest there may be a salty ocean beneath the surface.
Sources
- NASA/JPL Solar System Dynamics, Planetary Satellite Physical Parameters (radii from Archinal et al. 2018, Celest. Mech. 130, 22; Charon from Nimmo et al. 2017, Icarus 287, 12)
- NASA/JPL Solar System Dynamics, Planetary Satellite Mean Elements
- NASA/JPL Solar System Dynamics, Planetary Satellite Discovery Circumstances
- NASA Science, Callisto