Kalyke or Jupiter XXIII, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard, et al. in 2000, and given the designation S/2000 J 2.
Kalyke is about 5.2 kilometres in diameter, and orbits Jupiter at an average distance of 23,181,000 km in 721.021 days, at an inclination of 166° to the ecliptic (165° to Jupiter's equator), with an orbital eccentricity of 0.2140.
It belongs to the Carme group, made up of non-spherical retrograde moons orbiting Jupiter at a distance ranging between 23,000,000 and 24,000,000 km and at an inclination of about 165°.
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