Dione
Dione, also designated Saturn IV, is the fourth-largest moon of Saturn. Its trailing hemisphere is marked by large ice cliffs called chasmata and is also darkened compared to the leading hemisphere. Based on its density, Dione’s interior is likely a combination of silicate rock and water ice in nearly equal parts by mass.
Dione
| Orbit | 377,396 km |
| Diameter | 1020 km |
| Gravity | 0.02g (negligable) |
| Day Length | synchronous |
| Year Length | 2.74 days |
| Atmospheric Pressure | <1 nPa (exosphere) |
| Atmospheric Composition | O2,CO2 |
| Temperature | -186°C |
Type
Planetoid / Moon
Location under
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