Moon
Dione
Moon of Saturn
Moon of Saturn
Photo: NASA · Public domain · Wikimedia Commons
Dione is the fourth-largest moon of Saturn. With a mean diameter of 1,123 km and a density of about 1.48 g/cm3, Dione is composed of an icy mantle and crust overlying a silicate rocky core, with rock and water ice roughly equal in mass. Its trailing hemisphere is marked by large cliffs and scarps called chasmata; the trailing hemisphere is also significantly darker compared to the leading hemisphere.
Description from Wikipedia (CC BY-SA 4.0).
Key facts
Distance
Orbits Saturn
Orbits
Saturn
Mean radius
562 km
Orbital period
2.74 days
Discovered
1684 · Giovanni Domenico Cassini
Orbits
Saturn
