Adjective(s) Unknown
Orbital properties
Aphelion/apoapsis Unknown
Perihelion/periapsis Unknown
Semi-major axis 52 526 ± 1 km
Orbital eccentricity 0.0002 ± 0.0002
Orbital period 0.33465551 ± 0.00000001 days
Average orbital speed Unknown
Physical properties
Radius 75 ± 3 km
Mass ~2.2×1018 kg
Mean density ~1.2 g/cm³ (estimate)
Escape velocity ~0.063 km/s
Rotation period synchronous
Average surface temperature ~51 K mean (estimate)
Apparent magnitude 22.0
Moons 0
Despina is a moon of Neptune, located in Neptune's ring system.


It was discovered in July 1989 when Voyager 2 flew by Neptune.

Name EtymologyEdit

It was named after the daughter of Poseidon and Demeter.


Statistic Name Statistic Calculation
Orbit Time 8 Hours
Relativity to other moons 3rd moon from the planet


  • It is the third closest moon to Neptune.
  • it is an irregularly shaped natural satellite.

Neptunian Moons
Naiad Thalassa Despina Galatea Larissa S/ 2004 N1

Proteus Triton Nereid Halimede Sao Laomedeia Psamathe Neso