What is Helike (moon)?
'''Helike''' or '''{{nowrap|Jupiter XLV}}''', is a [[Satellite (natural)|moon]] of [[Jupiter (planet)|Jupiter]]. It was found by a team of astronomers from the [[University of Hawaii]] led by [[Scott S. Sheppard]] in 2003, and given the designation '''{{nowrap|S/2003 J 6}}'''.<ref>[http://cfa-www.harvard.edu/iauc/08000/08087.html IAUC 8087: ''Satellites of Jupiter''] 2003 March 4 (discovery)</ref><ref>[http://cfa-www.harvard.edu/iau/mpec/K03/K03E11.html 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)</ref><ref>[http://cfa-www.harvard.edu/mpec/K03/K03E29.html 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)</ref> Helike is about 4 kilometres in diameter, and orbits Jupiter at an average distance of 20,540,000&nbsp;km in 601.402 Earth days, at an [[inclination]] of 155° to the [[ecliptic]] (156° to Jupiter's equator), with an [[orbital eccentricity]] of 0.1375. It was named in March 2005 after [[Helike (mythology)|Helike]], one of the nymphs that nurtured [[Zeus]] (Jupiter) in his infancy on [[Crete]].<ref>[http://cfa-www.harvard.edu/iauc/08500/08502.html IAUC 8502: ''Satellites of Jupiter''] 2005 March 30 (naming the moon)</ref> Helike belongs to the [[Ananke group]], retrograde non-[[Sphere|spherical]] moons which orbit Jupiter between 19,300,000 and 22,700,000&nbsp;km, at inclinations of about 150°. == References == {{reflist}} {{Moons of Jupiter}} {{sci-stub}} [[Category:Jupiter's moons]]