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2013 LX28
, also written 2013 LX28, is an asteroid that is a temporary quasi-satellite of the Earth, the third known Earth quasi-satellite.
==Discovery, orbit and physical properties==
was discovered on June 12, 2013. As of September 2014, it has been observed 26 times with a data-arc span of 349 days. It is an Apollo asteroid and its semi-major axis (1.0016 AU) is very similar to that of the Earth but it has relatively high eccentricity (0.4521) and high orbital inclination (49.9761°). With an absolute magnitude of 21.7, it has a diameter in the range 130–300 m (for an assumed albedo range of 0.04–0.20).
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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