| Dione | |
|---|---|
| |
| Diameter | 1,120 km 695 mi. |
| Distance from primary | 377,400 km 234,505 mi. |
Dione is the twelfth moon of Saturn. This moon was discovered by Cassini in 1684. Dione is the densest of Saturn's moons. It is made mostly of water ice and also must have a fraction of denser material such as silicate rock.[1]