Despina (moon)

From Simple English Wikipedia, the free encyclopedia

Despina as seen by Voyager 2
(smeared horizontally)
Discovered by Stephen P. Synnott
Discovered in July 1989
Orbital characteristics
Epoch 18 August 1989
Semi-major axis 52 526 ± 1 km
Eccentricity 0.0002 ± 0.0002
Orbital period 0.33465551 ± 0.00000001 d
Inclination 0.216 ± 0.014° (to Neptune equator)

0.06° (to local Laplace plane)

Is a moon of Neptune
Physical characteristics
Dimensions 180×150×130 km
Mass ~2.1×1018 kg
(based on assumed density)
Mean density ~1.2 g/cm3 (estimate)
Rotation period assumed synchronous
Axial tilt ~zero presumably
Albedo (geometric) 0.09[1]
Surface temp. ~51 K mean (estimate)
Atmosphere none

Despina or Neptune V is the third closest moon to Neptune. It is named after Despina, a nymph who was a daughter of Poseidon.

Despina was found in late July 1989 from the images taken by the Voyager 2 probe. It was given the designation S/1989 N 3.

Despina is not a sphere and shows no sign of any geological changes.

Other websites[change | change source]

References[change | change source]

  1. E. Karkoschka (2003). "Sizes, shapes, and albedos of the inner satellites of Neptune". Icarus. 162 (2): 400–407. Bibcode:2003Icar..162..400K. doi:10.1016/S0019-1035(03)00002-2.