Helike

Helike (pronounced /ˈhɛlɨki/ HEL-ə-kee, or as in Greek Ελίκη), also known as Jupiter XLV, is a moon of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and given the temporary designation S/2003 J 6.[1][2][3]

Helike is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 20,540 Mm in 601.402 days, at an inclination of 155° to the ecliptic (156° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.1375.

It was named in March 2005 after Helike, one of the nymphs that nurtured Zeus (Jupiter) in his infancy on Crete.[4]

Helike belongs to the Ananke group, retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm, at inclinations of roughly 150°.

References

1. ^ IAUC 8087: Satellites of Jupiter 2003 March 4 (discovery)
2. ^ MPEC 2003-E11: S/2003 J 1, 2003 J 2, 2003 J 3, 2003 J 4, 2003 J 5, 2003 J 6, 2003 J 7 2003 March 4 (discovery and ephemeris)
3. ^ MPEC 2003-E29: S/2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S/2003 J 1, 2003 J 6 2003 April 3 (revised ephemeris)
4. ^ IAUC 8502: Satellites of Jupiter 2005 March 30 (naming the moon)