Dione
moon of Saturn · with cliffs of bright ice
8.62 AU from Earth
An icy moon 1,123 km across. Its darker trailing side is streaked with bright cliffs of ice, some of them hundreds of metres high, the walls of canyons where the dark surface material has fallen off; its gravity and shape suggest an ocean about 65 km deep under 100 km of ice.
- 1,123 km across · density 1.48 g/cm³, ice and rock
- its leading side is 1.6 times as bright as its trailing side
Numbers that change with time are from 8 November 2026.
open Dione in the atlas ›- kind
- place in the Solar System · moon or small world
- distance
- 377,396 km from Saturn
- size
- 1,120 km across
- orbits
- Saturn