| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Seth Barnes Nicholson | ||||||
| Discovered in | 1951 | Orbital characteristics | |||||
| Mean radius | 21,048,000 km | ||||||
| Eccentricity | 0.083-0.452 | ||||||
| Orbital period | ~629d | ||||||
| Inclination | 122.2-172.9° | ||||||
| Is a satellite of | Jupiter | ||||||
| Physical characteristics | |||||||
| Equatorial diameter | ~30 km | ||||||
| Surface area | km2 | ||||||
| Mass | 3.82×1016 kg | ||||||
| Mean density | 2.7 g/cm3 | ||||||
| Surface gravity | 0.010 m/s2 | ||||||
| Rotation period | ? | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 | ||||||
| Surface temp |
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| Atmospheric pressure | 0 kPa | ||||||
Ananke (pronounced "a NANG kee") is one of Jupiter's moons. It was discovered by Seth Barnes Nicholson at Lick Observatory in 1951 and is named after the mother of Adrastea, by Jupiter. Ananke has a retrograde orbit.