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Ananke
One of the largest of the outer irregular satellites of Jupiter.
| discovery | 1951, by Seth Barnes Nicholson |
| semimajor axis | 21,455,000 km (13,334,000 miles) |
| diameter | 28 km (17 miles) |
| mean density | 2.6 g/cm3 |
| escape velocity | 0.017 km/s (61 km/h, 38 mph) |
| orbital period | -642.02 days (retrograde) |
| orbital eccentricity | 0.345 |
| orbital inclination | 151.56° |
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