S/2003 J 12 on:
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is a
April 3, 2003 (discovery and ephemeris) is about in diameter, and orbits Jupiter at an average distance of 21,600 Orders_of_magnitude_(length)#1_megametre, Mm in 647 days, at an inclination of 155° to the ecliptic, in a retrograde motion, retrograde direction and with an eccentricity (orbit), eccentricity of 0.366. It was initially thought to the innermost of the retrograde satellites of Jupiter, but recovery observations have shown that it is an ordinary member of the Ananke group.
This moon was considered lost asteroid, lost until late 2020, when it was recovered in archival CFHT images from 2001-2011 by amateur astronomer Kai Ly. The recovery of the moon was announced by the Minor Planet Center on 13 January 2021.
natural satellite
A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are often colloquially referred to as ''moons'' ...
of Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but slightly less than one-thousandth t ...
, and is one of the smallest known natural satellites in the Solar System. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003.MPEC 2003-E29: S/2003 J 9, 2003 J 10, 2003 J 11, 2003 J 12; S/2003 J 1, 2003 J 6April 3, 2003 (discovery and ephemeris) is about in diameter, and orbits Jupiter at an average distance of 21,600 Orders_of_magnitude_(length)#1_megametre, Mm in 647 days, at an inclination of 155° to the ecliptic, in a retrograde motion, retrograde direction and with an eccentricity (orbit), eccentricity of 0.366. It was initially thought to the innermost of the retrograde satellites of Jupiter, but recovery observations have shown that it is an ordinary member of the Ananke group.
This moon was considered lost asteroid, lost until late 2020, when it was recovered in archival CFHT images from 2001-2011 by amateur astronomer Kai Ly. The recovery of the moon was announced by the Minor Planet Center on 13 January 2021.
References
{{DEFAULTSORT:S 2003 J 12 Moons of Jupiter Ananke group Irregular satellites Astronomical objects discovered in 2003, 20030208 Discoveries by Scott S. Sheppard Moons with a retrograde orbit