Английская Википедия:702 Alauda

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Шаблон:Use dmy dates Шаблон:Infobox planet

702 Alauda Шаблон:IPAc-en, provisional designation Шаблон:Mp, is a carbonaceous asteroid and binary system from the outer asteroid belt, approximately 190 kilometers in diameter.[1] It is the parent body of the Alauda family. Discovered in 1910 by German astronomer Joseph Helffrich at Heidelberg Observatory, it was named after the lark (alauda).[2][3] Its small moon, named Pichi üñëm, was discovered in 2007.[4][5]

Satellite

Alauda's satellite Pichi üñëm provisionally known as Шаблон:Mp, was discovered on 26 July 2007 from observations using adaptive-optics imaging with the European Southern Observatory (ESO) 8-m Very Large Telescope (VLT) on Cerro Paranal, Chile.[4] It is about 3.5 km in diameter (assuming it has the same albedo as the primary) and orbits Alauda in a nearly circular orbit at a distance of Шаблон:Val. Pichi üñëm takes 4.91 days to complete one orbit.[6][5][7] It was named Pichi üñëm (Mapuche pronunciation: Шаблон:IPA-xx, approximately Шаблон:IPAc-en), meaning "little bird" in the Mapuche language of Chile, the country from which the moon was discovered.[8]

Orbital characteristics

Alauda has been identified as the largest member of the Alauda family, a dynamical family of bright carbonaceous asteroids with more than a thousand known members.[9]Шаблон:Rp Other members of this family include: 581 Tauntonia, 1101 Clematis, 1838 Ursa, 3139 Shantou, 3325 TARDIS, 4368 Pillmore, 5360 Rozhdestvenskij, 5815 Shinsengumi, and many others.[10] Alauda's moon may be a result of the collision that created the asteroid family.[4]

Physical characteristics

The discovery and tracking of Alauda's moon enabled Alauda's mass to be determined. The discoverers of the moon, Patricio Rojo and Jean-Luc Margot, estimated Alauda's mass to be (6.057 ± 0.36)Шаблон:E kg and its density to be (1.57 ± 0.5) g/cm3.[6]

Occultations

Alauda has been observed to occult stars on several occasions, providing important information on its size and shape. It produced occultations on 2001-07-12 and 2004-04-21.[11] It may have occulted an apparent magnitude 9.5 star in the constellation of Gemini on 2009-10-17 at 08:18 UT.[12] This event should have been visible from Uruguay, Argentina, and Chile.[12]

References

Шаблон:Reflist

External links

Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control

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  1. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок springer не указан текст
  4. ↑ 4,0 4,1 4,2 Ошибка цитирования Неверный тег <ref>; для сносок Margot-2007 не указан текст
  5. ↑ 5,0 5,1 Ошибка цитирования Неверный тег <ref>; для сносок CBET1016 не указан текст
  6. ↑ 6,0 6,1 Ошибка цитирования Неверный тег <ref>; для сносок Rojo-2011 не указан текст
  7. ↑ Шаблон:Cite web
  8. ↑ Шаблон:Cite web Шаблон:Small
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Nesvorny-2014 не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок family не указан текст
  11. ↑ Шаблон:Cite web
  12. ↑ 12,0 12,1 Шаблон:Cite webШаблон:Dead link
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