Английская Википедия:(192642) 1999 RD32

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Шаблон:Short description

Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp, provisional designation: Шаблон:Mp, is an asteroid and suspected contact binary on an eccentric orbit, classified as a large near-Earth object and potentially hazardous asteroid of the Apollo group, approximately Шаблон:Convert in diameter. It was discovered on 8 September 1999, at a magnitude of 18, by astronomers of the LINEAR program using its 1-meter telescope at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, United States.[1][2] The asteroid is likely of carbonaceous composition and has a rotation period of 17.08 hours.[3]Шаблон:Efn

Description

Шаблон:Mp orbits the Sun at a distance of 0.6–4.7 AU once every 4 years and 4 months (1,571 days; semi-major axis of 2.64 AU). Its orbit has a high eccentricity of 0.77 and an inclination of 7° with respect to the ecliptic.[4]

The asteroid's observation arc begins with a precovery taken at Palomar Observatory in January 1995.[1] It is known that Шаблон:Mp passed Шаблон:Convert from Earth on 27 August 1969.[5] During the 1969 close approach the asteroid reached about apparent magnitude 8.8.[6] The similarly-sized 4179 Toutatis also reached that brightness in September 2004. It passed less than Шаблон:Convert from asteroid 29 Amphitrite on 17 January 1939.[4]

Arecibo radar observations on 5–6 March 2012 showed that Шаблон:Mp is approximately Шаблон:Convert in diameter[7] and has an estimated albedo of only 0.04.[7] Other sources calculate a smaller diameter of 1.63 kilometers based on a dated assumption, that the object is a stony rather than a carbonaceous asteroid.[3] The two visible lobes suggest that Шаблон:Mp is a tight binary asteroid or contact binary.[7] About 10–15% of near-Earth asteroids larger than 200 meters are expected to be contact binary asteroids with two lobes in mutual contact.[8]

Close-approaches to Earth[5]
Date Distance from Earth
1969-08-27 Шаблон:Convert
2012-03-14 Шаблон:Convert
2042-03-11 Шаблон:Convert
2046-09-04 Шаблон:Convert

Шаблон:Large near earth asteroid flybys 5LD

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 13 November 2008.[9] As of 2018, it has not been named.[1]

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

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

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  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPEC1999-R32 не указан текст
  3. ↑ 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок lcdb не указан текст
  4. ↑ 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  5. ↑ 5,0 5,1 Ошибка цитирования Неверный тег <ref>; для сносок jpl-close не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок NEODyS1969 не указан текст
  7. ↑ 7,0 7,1 7,2 Ошибка цитирования Неверный тег <ref>; для сносок Goldstone-planning не указан текст
  8. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Busch-2012 не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPC-Circulars-Archive не указан текст
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