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2011 UN63
, also written as 2011 UN63, is a small minor body orbiting near the of Mars (60 degrees behind Mars on its orbit).〔 ==Discovery, orbit and physical properties== was first observed on September 27, 2009 by the Mt. Lemmon Survey and given the provisional designation . Lost, it was re-discovered on October 21, 2011 again by the Mt. Lemmon Survey.〔 follows a low eccentricity orbit (0.064) with a semi-major axis of 1.52 AU.〔(MPC data on 2011 UN63 )〕 This object has moderate orbital inclination (20.4°).〔 It was classified as Mars-crosser by the Minor Planet Center upon discovery. Its orbit is relatively well determined as it is currently (March 2013) based on 64 observations with a data-arc span of 793 days.〔(JPL's Solar System Dynamics data on 2011 UN63 )〕 This asteroid has an absolute magnitude of 19.7 which gives a characteristic diameter of 560 m.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「2011 UN63」の詳細全文を読む
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