| Proper Name | Dione | | Designation | Saturn IV | | Primary Planet | Saturn | | Orbital Period | 2 days, 17 hours, 41 minutes | | Distance from Saturn | Semi-Major Axis: 377,396 km
Periapsis: 376,566 km
Apoapsis: 378,226 km | | Eccentricity | 0.0022 | | Rotation Period | 2 days, 17 hours, 41 minutes (synchronous orbit) | | Mean Diameter | 1,123.5 km
698.1 miles | | Notes | Composed largely of water ice, Dione has a generslly glistening light surface. The hemisphere that trails as it orbits Saturn has a darker colouration, perhaps due to interactions with Saturn's intense magnetic field. |
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