Moon
One of the most eccentric orbits of any moon in the solar system, swinging from close to Neptune to far beyond it.
| Type | Moon |
|---|---|
| Orbits | Neptune |
| Distance from parent body | 5,513,400 km |
| Diameter | 340 km |
| Mass | 3.10 × 10^19 kg |
| Surface gravity | 0.07 m/s² |
| Temperature | -223°C |
| Orbital period | 360 days |
| Rotation period | 11.52 hours |
| Apparent magnitude | 19.7 |
| Redshift | 0 |
| Discovered | 1949 |
At 340 km across, Nereid is 9.8 percent of the diameter of Earth's Moon.
Its mass is less than a thousandth of the mass of Earth.
It orbits Neptune at 5,513,400 km, further out than the Moon orbits Earth.
A single orbit takes 360.1 days.
An average temperature of 50 K works out at -223 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1949.
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