Ananke (moon)
Ananke photographed by the Haute-Provence Observatory in August 1998 | |
| Discovery | |
|---|---|
| Discovered by | Seth B. Nicholson |
| Discovery site | Mt. Wilson Observatory |
| Discovery date | 28 September 1951 |
| Designations | |
Designation | Jupiter XII |
| Pronunciation | /əˈnæŋkiː/ |
Named after | Ἀνάγκη Anagkē |
| Adjectives | Anankean /ænəŋˈkiːən/ |
| Orbital characteristics | |
| Epoch 17 December 2020 (JD 2459200.5) | |
| Observation arc | 69.05 yr (24,338 days) |
| 0.1406602 AU (21,042,470 km) | |
| Eccentricity | 0.1747248 |
| –623.59 d | |
| 339.61045° | |
| 0° 34m 38.281s / day | |
| Inclination | 148.67482° (to ecliptic) |
| 86.44368° | |
| 135.63033° | |
| Satellite of | Jupiter |
| Group | Ananke group |
| Physical characteristics | |
| 29.1±0.6 km | |
| Mass | 1.68×1016 kg (calculated) |
Mean density | 1.30 g/cm3 (assumed) |
| 8.31±0.15 h | |
| Albedo | 0.038±0.006 |
Spectral type | P |
| 18.9 | |
| 11.7 | |
Ananke (/əˈnæŋki/) also known as Jupiter XII, is a one of larger retrograde irregular moon of Jupiter.