Ananke group

This diagram illustrates the largest irregular satellites of Jupiter. The location of the Ananke group is illustrated by Ananke's presence near the bottom. An object's position on the horizontal axis indicates its distance from Jupiter. The vertical axis indicates its inclination. Eccentricity is indicated by yellow bars illustrating the object's maximum and minimum distances from Jupiter. Circles illustrate an object's size in comparison to the others.

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:[1][2]

Name Diameter
(km)[3]		 Period
(days)[4][a]
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.

  1. ^ Jewitt, David C.; Sheppard, Scott S.; Porco, Carolyn (2004). Bagenal, Fran; Dowling, Timothy E.; McKinnon, William B. (eds.). Jupiter. The planet, satellites, and magnetosphere (PDF). Jupiter's outer satellites and Trojans. Cambridge planetary science. Vol. 1. Cambridge, UK: Cambridge University Press. pp. 263–280. ISBN 0-521-81808-7. Archived from the original (PDF) on 2007-06-14.
  2. ^ Nesvorný, David; Beaugé, Cristian; Dones, Luke (2004). "Collisional Origin of Families of Irregular Satellites". The Astronomical Journal. 127 (3): 1768–1783. Bibcode:2004AJ....127.1768N. doi:10.1086/382099. S2CID 27293848 – via IOP Publishing.
  3. ^ Cite error: The named reference scott jupiter was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference nasa parameters was invoked but never defined (see the help page).


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