Ananke group
The Ananke group is a group of retrograde irregular satellites of Jupiter that follow similar orbits to Ananke and are thought to have a common origin.
Their semi-major axes (distances from Jupiter) range between 19.2 and 21.8 Gm, their orbital inclinations between 144.3° and 155.5°, and their orbital eccentricities between 0.09 and 0.30.
The members of the Ananke group are:
| Name | Diameter (km) | Period (days) |
|---|---|---|
| Ananke | 28 | –629.79 |
| Harpalyke | 4 | –623.32 |
| Iocaste | 5 | –631.59 |
| Praxidike | 7 | –625.39 |
| Thyone | 4 | –627.18 |
| Hermippe | 4 | –633.90 |
| Euanthe | 3 | –620.44 |
| Euporie | 2 | –550.69 |
| Orthosie | 2 | –622.59 |
| Mneme | 2 | –620.07 |
| Thelxinoe | 2 | –628.03 |
| Helike | 4 | –626.33 |
| S/2010 J 2 | 1 | –618.84 |
| S/2016 J 1 | 1 | –618.49 |
| S/2003 J 18 | 2 | –598.12 |
| Eupheme | 2 | –617.73 |
| S/2017 J 3 | 2 | –625.60 |
| S/2017 J 7 | 2 | –626.56 |
| S/2017 J 9 | 3 | –666.11 |
| S/2003 J 2 | 2 | –628.79 |
| S/2003 J 12 | 1 | –627.24 |
| S/2003 J 16 | 2 | –622.88 |
| S/2021 J 1 | 1 | –627.14 |
| S/2021 J 2 | 1 | –625.14 |
| S/2021 J 3 | 2 | –618.33 |
| S/2022 J 3 | 1 | –630.67 |
The International Astronomical Union (IAU) reserves names ending in -e for all retrograde moons, including this group's members.
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