Английская Википедия:2014 HQ124

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Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Aten group, approximately Шаблон:Convert in diameter. It passed 3.25 lunar distances (LD) from Earth on 8 June 2014.[1] It was discovered on 23 April 2014 by NEOWISE.[2] It is estimated that an impact event would have had the energy equivalent of 2,000 megatons of TNT and would have created a Шаблон:Convert impact crater.[3] The news media misleadingly nicknamed it The Beast.[4] Шаблон:Mp previously passed this close to Earth in 1952[1] and will not again until at least 2307.[5] Radar imaging suggests it may be a contact binary.[6]

Orbit

Шаблон:Mp orbits the Sun at a distance of 0.6–1.1 AU once every 0 years and 9 months (287 days; semi-major axis of 0.85 AU). Its orbit has an eccentricity of 0.26 and an inclination of 26° with respect to the ecliptic.[7]

2014 close approach

Файл:PIA18412-Asteroid2014HQ124-20140608.jpg
Шаблон:Mp radar images in June 2014

On 6 June 2014, the asteroid brightened to about apparent magnitude 13.7 while in the southern constellation of Horologium.[8] Near its closest approach to Earth of 3.25 lunar distances on 8 June 2014, the asteroid crossed the celestial equator, making it a northern hemisphere object. It however had an elongation of about 20 degrees from the Sun,[8] and was lost in astronomical twilight during the closest approach to Earth. The Goldstone Deep Space Network observed the asteroid later on 8 June 2014,[9] when the asteroid was between 3.6 and 3.8 lunar distances.[6]

Шаблон:Multiple image

Physical characteristics

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Шаблон:Mp measures (Шаблон:Val) kilometers in diameter and its surface has an albedo of (Шаблон:Val) based on an absolute magnitude of 18.9.[10][11]

Radar observations at Goldstone suggest that the object is elongated and irregular in shape, with its long axis measuring at least Шаблон:Convert. Lance Benner suspects it the be a contact binary, composed of two merged objects forming a single asteroid with a lobed shape.[6]

Photometric observations by astronomers with the Mission Accessible Near-Earth Objects Survey (MANOS) and subsequent evaluation by Brian WarnerШаблон:'s Collaborative Asteroid Lightcurve Link, determined that Шаблон:Mp has a rotation period of at least 16 hours.[12][13] While the object's spectral type is unknown, Warner assumes it to be an S-type asteroid, based on its high albedo, which is typical for stony asteroids.[12]

Related objects

On average, an object about the size of Шаблон:Mp will pass this close to Earth every few years.[14] Similar events, where other 100+ meter diameter asteroids have or will soon pass less than 4 LD from Earth, include:

  • 4179 Toutatis (~3000 meters in diameter) passed 4.0 LD from Earth on 29 September 2004
  • Шаблон:Mpl (~500 meters in diameter) passed 1.1 LD from Earth on 3 July 2006
  • Шаблон:Mpl (~360 meters in diameter) passed 0.8 LD from Earth on 8 November 2011
  • Шаблон:Mp (~140 meters in diameter) passed 3.2 LD from Earth on 4 March 2014[15]
  • Шаблон:Mpl (~600 meters in diameter) passed 3.1 LD from Earth on 26 January 2015[16]

See also

References

Шаблон:Reflist

External links

Шаблон:2014 in space Шаблон:Planetary defense Шаблон:Small Solar System bodies Шаблон:Authority control

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  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок jpl-close не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPEC2014-H67 не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок SA20140606 не указан текст
  4. ↑ Шаблон:Cite tweet
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Busch не указан текст
  6. ↑ 6,0 6,1 6,2 Ошибка цитирования Неверный тег <ref>; для сносок JPL186 не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  8. ↑ 8,0 8,1 Ошибка цитирования Неверный тег <ref>; для сносок NEODyS2014 не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Goldstone не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Mainzer-2016 не указан текст
  11. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Ferret не указан текст
  12. ↑ 12,0 12,1 Ошибка цитирования Неверный тег <ref>; для сносок lcdb не указан текст
  13. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Thirouin-2016 не указан текст
  14. ↑ Ошибка цитирования Неверный тег <ref>; для сносок pr2014-178 не указан текст
  15. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpl-EG45 не указан текст
  16. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpl-BL86 не указан текст
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