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(121514) 1999 UJ7
is a small asteroid orbiting near the of Mars (60 degrees ahead Mars on its orbit). As of September 2011, is the only known asteroid to orbit the leading of Mars, although at least three other asteroids orbit Mars's trailing : 5261 Eureka, , and .〔 Not only does orbit on the other side of Mars from other similar asteroids, its spectrum is different as well, which is puzzling because all of the Martian trojans seem to be in very stable orbits.〔
== Orbit ==
orbits around the of Mars in a very stable orbit and is large enough that the Yarkovsky effect will not affect its orbit.〔
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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