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(420356) 2012 BX85
is a trans-Neptunian object (TNO) and possibly a dwarf planet〔 lying in the Kuiper Belt. It has the second lowest eccentricity of any TNO, after . orbits near the 3:5 resonance to Neptune, but takes about 160 Neptune orbits (26,500 years) to make an orbit less than would be expected of an object in a true 3:5 resonance. It was discovered on January 23, 2012, with precovery observations accepted by the Minor Planet Center dating back to December 2011, with possible precovery observations dating back to 2004 that have yet to be accepted.
The asteroid is one of the most recently-discovered asteroids to be given a numeric designation, most likely because of the large number of observations, on average about one every 10 days since it was discovered. All of the observations, except 6 in February 2013, were made by the Mount Graham Observatory, the discovery site.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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