Английская Википедия:2011 UN63
Шаблон:Use dmy dates Шаблон:Infobox planet Шаблон:Mp, also written as 2011 UN63, is a Mars trojan, an asteroid orbiting near the Шаблон:L5 of Mars (60 degrees behind Mars on its orbit).[1][2]
Discovery, orbit and physical properties
Шаблон:Mp was first observed on 27 September 2009 by the Mt. Lemmon Survey and given the provisional designation Шаблон:Mp. Lost, it was re-discovered on 21 October 2011 again by the Mt. Lemmon Survey.[3] Шаблон:Mp follows a low eccentricity orbit (0.064) with a semi-major axis of 1.52 AU.[3] This object has moderate orbital inclination (20.4°).[3] 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.[4] This asteroid has an absolute magnitude of 19.7 which gives a characteristic diameter of 560 m.[4]
Mars trojan and orbital evolution
Recent calculations[1][2] indicate that it is a stable Шаблон:L5 Mars trojan asteroid with a libration period of 1350 yr and an amplitude of 14°. These values as well as its short-term orbital evolution are similar to those of 5261 Eureka or Шаблон:Mpl.
Origin
Long-term numerical integrations show that its orbit is very stable on Gyr time-scales (1 Gyr = 1 billion years). As in the case of Eureka, calculations in both directions of time (4.5 Gyr into the past and 4.5 Gyr into the future) indicate that Шаблон:Mp may be a primordial object, perhaps a survivor of the planetesimal population that formed in the terrestrial planets region early in the history of the Solar System.[1]
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
- Further reading
- Three new stable L5 Mars Trojans de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society: Letters, Vol. 432, Issue 1, pp. 31–35.
- Orbital clustering of Martian Trojans: An asteroid family in the inner solar system? Christou, A. A. 2013, Icarus, Vol. 224, Issue 1, pp. 144–153.
External links
- Шаблон:Mp data at MPC
- Шаблон:Mp data at AstDyS-2.
- Шаблон:JPL small body
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