Английская Википедия:(311999) 2007 NS2

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Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp is an asteroid and Mars trojan orbiting near the Шаблон:L5 of Mars.

Discovery, orbit and physical properties

Шаблон:Mp was discovered on 14 July 2007, by the Observatorio Astronómico de La Sagra.[1][2][3][4][5] Its orbit is characterized by low eccentricity (0.054), moderate inclination (18.6°) and a semi-major axis of 1.52 AU.[5] Upon discovery, it was classified as Mars-crosser by the Minor Planet Center. Its orbit is well determined as it is currently (March 2013) based on 87 observations with a data-arc span of 4,800 days.[6] Шаблон:Mp has an absolute magnitude of 17.8, which gives a characteristic diameter of 870 m.[6]

Mars trojan and orbital evolution

Jean Meeus suspected that Шаблон:Mp was a Mars Trojan, and this was confirmed by Reiner Stoss's analysis of two sets of observations dating from 1998 on the MPC database.[7] It was confirmed to be a Mars Trojan numerically in 2012.[8] Recent calculations confirm that it is a stable Шаблон:L5 Mars Trojan asteroid with a libration period of 1310 years and an amplitude of 14°.[9][10] These values as well as its short-term orbital evolution are similar to those of 5261 Eureka. Out of all known Mars Trojans, it currently has the smallest relative (to Mars) semimajor axis, 0.000059 AU.[9]

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.[9]

Файл:Animation of 2007 NS2 relative to Sun and Mars 1600-2500.gif
Animation of 2007 NS2 relative to Sun and Mars 1600-2500
Шаблон:Legend2Шаблон:·Шаблон:Legend2Шаблон:·Шаблон:Legend2

See also

References

Шаблон:Reflist

Further reading

External links

Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Mars Шаблон:Portal bar Шаблон:Authority control

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 2007 NS2 discovery blog
  2. ↑ Discovery MPEC
  3. ↑ Update MPEC
  4. ↑ New Scientist article on the discovery
  5. ↑ 5,0 5,1 MPC data on 2007 NS2
  6. ↑ 6,0 6,1 Ошибка цитирования Неверный тег <ref>; для сносок JPL не указан текст
  7. ↑ Шаблон:Cite web
  8. ↑ Шаблон:Cite journal
  9. ↑ 9,0 9,1 9,2 Шаблон:Cite journal
  10. ↑ Шаблон:Cite journal
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