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 19.3 and 22.7 Gm, their orbital inclinations between 145.7° and 154.8°, and their orbital eccentricities between 0.02 and 0.28.

The core members include (from largest to smallest):

  • Ananke
  • Praxidike
  • Iocaste
  • Harpalyke
  • Thyone
  • Euanthe
  • Euporie

The International Astronomical Union (IAU) reserves names ending in -e for all retrograde moons, including this group's members.

Read more about Ananke Group:  Origin

Famous quotes containing the word group:

    Just as a person who is always asserting that he is too good-natured is the very one from whom to expect, on some occasion, the coldest and most unconcerned cruelty, so when any group sees itself as the bearer of civilization this very belief will betray it into behaving barbarously at the first opportunity.
    Simone Weil (1910–1943)