Naiad (moon)
Moon of Neptune / From Wikipedia, the free encyclopedia
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Naiad /ˈneɪəd/, (also known as Neptune III and previously designated as S/1989 N 6) named after the naiads of Greek legend,[10] is the innermost satellite of Neptune and the nearest to the center of any gas giant with moons with a distance of 48,224 km from the planet's center. Its orbital period is less than a Neptunian day, resulting in tidal dissipation that will cause its orbit to decay. Eventually it will either crash into Neptune's atmosphere or break up to become a new ring.[11]
Quick Facts Discovery, Discovered by ...
Discovery | |
---|---|
Discovered by | Voyager Imaging Team |
Discovery date | September 1989 |
Designations | |
Designation | Neptune III |
Pronunciation | /ˈneɪəd/ or /ˈnaɪæd/,[1][2] /ˈneɪəd/ or /ˈnaɪəd/[3] |
Named after | pl. Ναϊάδες Nāïades |
Adjectives | Naiadian /-ˈædiən/[4] |
Orbital characteristics[5][6] | |
Epoch 18 August 1989 | |
48 224.41 km | |
Eccentricity | 0.0047 ± 0.0018 |
0.2943958 ± 0.0000002 d | |
Inclination |
|
Satellite of | Neptune |
Physical characteristics | |
Dimensions | (96±8) × (60±16) × (52±8) km[7] |
Mean radius | 33±3 km[7] |
Mass | ~1.2×1017 kg (calculated) |
Mean density | 0.80±0.48 g/cm3[8] |
synchronous | |
zero | |
Albedo | 0.072[7][9] |
Temperature | ~51 K mean (estimate) |
23.91[9] |
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