S/2003 J 18

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S/2003 J 18 is a moon of Jupiter. It was found by a team of astronomers led by Brett J. Gladman in 2003.[1][2]

S/2003 J 18 is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 19,813,000 km in 569.728 days, at an inclination of 147° to the ecliptic (149° to Jupiter's equator), with an orbital eccentricity of 0.1570.

It belongs to the Ananke group, retrograde non-spherical moons which orbit Jupiter between 19,300,000 and 22,700,000 km, at inclinations of about 150°.

References[change | edit source]

  1. IAUC 8116: Satellites of Jupiter and Saturn 2003 April 11 (discovery)
  2. MPEC 2003-G20: S/2003 J 18 2003 April 4 (discovery and ephemeris)