Dione
Saturn's fourth-largest moon.
Dione is the fourth-largest moon of Saturn, about 1,123 km across, made of an icy mantle and crust over a rocky core. Its darker trailing hemisphere is cut by large cliffs called chasmata.
Giovanni Domenico Cassini discovered it in 1684. Voyager 1 imaged it in 1980 and the Cassini spacecraft flew past it several times.
Quick Facts
- Named after
- Διώνη Diōnē
- Adjectives
- Dionean d
- aɪ
- ə
- ˈ
- n
- iː
- ə
- n
- Discovered
- 30 March 1684
- Discoverer
- Giovanni Cassini
- Periapsis
- 376, 565 km / 351 mi
- Apoapsis
- 378, 226 km / 140 mi
- Inclination
- 0.019° (to Saturn's equator)
- Satellite of
- Saturn
More in Celestial Bodies & Worlds
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