Despina (moon)
Despina as seen by Voyager 2 (smeared horizontally) | |
| Discovery | |
|---|---|
| Discovered by | Stephen P. Synnott and Voyager Imaging Team |
| Discovery date | July 1989 |
| Designations | |
Designation | Neptune V |
| Pronunciation | /dəˈspaɪnə, dəˈspiːnə, dɛ-/ |
Named after | Δέσποινα Despœna |
| Adjectives | Despinian |
| Orbital characteristics | |
| Epoch 18 August 1989 | |
| 52 525.95 km | |
| Eccentricity | 0.00038 ± 0.00016 |
| 0.33465551 ± 0.00000001 d | |
| Inclination |
|
| Satellite of | Neptune |
| Physical characteristics | |
| Dimensions | (180±6) × (148±12) × (128±6) km |
| 75±3 km | |
| Volume | ~1.8×106 km3 |
| Mass | ~(0.71–1.4)×1018 kg |
Mean density | 0.4–0.8 g/cm3 |
| ~0.006–0.023 m/s2 | |
| ~0.032–0.054 km/s | |
| synchronous | |
| zero | |
| Albedo | 0.09 |
| Temperature | ~51 K mean (estimate) |
| 22.0 | |
Despina /dɛˈspaɪnə/, also known as Neptune V, is the third-closest inner moon of Neptune. It is named after Greek mythological character Despoina, a nymph who was a daughter of Poseidon and Demeter.