Dwarf Planet
Reclassified as a dwarf planet in 2006, it has a heart-shaped nitrogen-ice glacier.
| Type | Dwarf Planet |
|---|---|
| Distance from the Sun | 39.48 AU |
| Diameter | 2,377 km |
| Mass | 1.30 × 10²² kg |
| Surface gravity | 0.62 m/s² |
| Temperature | -229°C |
| Moons | 5 |
| Rings | No |
| Orbital period | 90,560 days |
| Rotation period | 153.3 hours |
| Apparent magnitude | 15.1 |
| Redshift | 0 |
| Discovered | 1930 |
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 2,377 km across, Pluto is 19 percent of the diameter of Earth.
Its mass is 0.2 percent of the mass of Earth.
It keeps an average distance of 39.48 AU from the Sun, so sunlight takes 5.5 hours to reach it.
A single orbit takes 248 years.
An average temperature of 44 K works out at -229 degrees Celsius, colder than the 15 degrees Earth averages.
5 moons are known to orbit it.
It has been on record since 1930.
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