Halimede
Moon· orbits Neptune
Halimede — moon of Neptune.
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Key facts
Radius
30.5 km
2% of our Moon's radius
Orbit around Neptune
5.13 Earth years
1,874 Earth days
Science
Physical
- Radius (estimated)
- 30.5 km · 2% of our Moon's radius
- Sized from its brightness assuming a dark (~0.04) surface — never resolved, so the true diameter (~61 km) could be off by a factor of two.
Orbit around Neptune
- Distance from Neptune
- 0.111 AU
- From JPL orbital elements
- Orbital period
- 5.13 years
- From JPL orbital elements
- Eccentricity
- 0.2519
- From JPL orbital elements
- Inclination to the J2000 equator
- 93.83 °
- From JPL orbital elements
Radiation & temperature
- Insolation
- 0.00112 S⊕ · 1/890 of the sunlight Earth receives
- Computed from the distance to the Sun (inverse-square; Earth's sunlight = 1), before any atmosphere.
Discovery & history
- By
- M. Holman, J.J. Kavelaars, T. Grav, W. Fraser, D. Milisavljevic
Halimede was discovered in 2002 by M. Holman and colleagues. Neptune's moons are named after sea deities and nymphs of Greek mythology. Beyond its discovery and naming, little more about it has been individually recorded.
Images
No resolved image of this moon has been released: telescopes and passing spacecraft have recorded it only as a faint point of light.