Английская Википедия:2011 UN63

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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

References

Шаблон:Reflist

Further reading

External links

Шаблон:Mars Шаблон:Portal bar Шаблон:Small Solar System bodies Шаблон:Authority control

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 1,2 Шаблон:Cite journal
  2. ↑ 2,0 2,1 Шаблон:Cite journal
  3. ↑ 3,0 3,1 3,2 MPC data on 2011 UN63
  4. ↑ 4,0 4,1 Шаблон:Cite web
Источник — http://wikihandbk.com/ruwiki/index.php?title=Английская_Википедия:2011_UN63&oldid=12718300