Английская Википедия:(121514) 1999 UJ7
Шаблон:Mp is a small asteroid orbiting near the Шаблон:L4 of Mars (60 degrees ahead Mars on its orbit).[1] As of September 2011, it is the only known asteroid to orbit the leading Шаблон:L4 of Mars, although at least three other asteroids orbit Mars's trailing Шаблон:L5: 5261 Eureka, Шаблон:Mpl, and Шаблон:Mpl.[1] Not only does Шаблон:Mp 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.[2]
Orbit
Шаблон:Mp orbits around the Шаблон:L4 of Mars in a very stable orbit and is large enough that the Yarkovsky effect will not affect its orbit.[1]
Physical characteristics
Due to similarity in the measured brightness of Шаблон:Mp with other Martian trojans, it is thought to be a small asteroid with an effective diameter on the order of Шаблон:Convert.[1] Its spectrum suggests that it is an X-type asteroid, which is different from 5261 Eureka and Шаблон:Mp,[2] and is somewhat puzzling since different mineral compositions suggest different origins for the two groups of asteroids. The long lifetime of the orbits for these asteroids makes the possibility of one or more of them being interlopers unlikely, however. This suggests that either one or more of the Martian trojans was captured in such a way as to give it a long-term stable orbit (and it is therefore not a primordial Martian asteroid), or that some fusion or combination of previous asteroids resulted in the presently observed ones.[2] The Yarkovsky effect may provide a potential capture mechanism but not enough is known about the shapes of these objects to provide a useful Yarkovsky model.[2]
See also
- 5261 Eureka (1990 MB)
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
- Шаблон:Mpl
References
External links
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Mars Шаблон:Portal bar Шаблон:Authority control
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