Dwarf Planet
The largest object in the asteroid belt and the only dwarf planet located there.
| Type | Dwarf Planet |
|---|---|
| Distance from the Sun | 2.77 AU |
| Diameter | 940 km |
| Mass | 9.10 × 10²⁰ kg |
| Surface gravity | 0.28 m/s² |
| Temperature | -105°C |
| Moons | 0 |
| Rings | No |
| Orbital period | 1,682 days |
| Rotation period | 9.07 hours |
| Apparent magnitude | 7.6 |
| Redshift | 0 |
| Discovered | 1801 |
Dwarf planets are round for the same reason planets are, gravity, but share their orbit with other bodies a full planet would have swept aside or absorbed.
At 940 km across, Ceres is 7.4 percent of the diameter of Earth.
Its mass is less than a thousandth of the mass of Earth.
It keeps an average distance of 2.77 AU from the Sun, so sunlight takes 23 minutes to reach it.
A single orbit takes 4.6 years.
An average temperature of 168 K works out at -105 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1801.
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