Larissa (moon)
Larissa from Voyager 2 | |
| Discovery | |
|---|---|
| Discovered by | Harold J. Reitsema, William B. Hubbard, Larry A. Lebofsky, and David J. Tholen |
| Discovery date | May 24, 1981 |
| Designations | |
Designation | Neptune VII |
| Pronunciation | /ləˈrɪsə/ |
Named after | Λάρισσα Lārissa |
| S/1989 N 2 S/1981 N 1 | |
| Adjectives | Larissean, Larissan, Larissian /ləˈrɪs(i)ən/ |
| Orbital characteristics | |
| Epoch 18 August 1989 | |
| 73 548.26 km | |
| Eccentricity | 0.001393 ± 0.00008 |
| 0.55465332 ± 0.00000001 d | |
| Inclination |
|
| Satellite of | Neptune |
| Physical characteristics | |
| Dimensions | 216 km × 204 km × 168 km (± 6 km × 16 km × 4 km) km |
| 97±3 km | |
| Volume | ~3.64×106 km3 |
| Mass | ~(0.19–5.7)×1018 kg |
Mean density | ~0.052–1.57 g/cm3 |
| ~0.001–0.054 m/s2 | |
| ~0.015–0.095 km/s | |
| synchronous | |
| zero | |
| Albedo | 0.09 |
| Temperature | ~51 K mean (estimate) |
| 21.5 | |
Larissa, also known as Neptune VII, is the fifth-closest inner satellite of Neptune. It is named after Larissa, a lover of Poseidon (the Greek equivalent of the Roman god Neptune).
Larissa is also the eponymous nymph of the city in Thessaly, Greece.