Английская Википедия:1881 Shao

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Шаблон:Infobox planet

1881 Shao, provisional designation Шаблон:Mp or Шаблон:Mp, is a background asteroid from the outer regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 3 August 1940, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany.[1] The presumed C-type asteroid has a rotation period of 7.45 hours.[2] It was named for Chinese astronomer Cheng-yuan Shao.[1]

Orbit and classification

Shao is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the outer main-belt at a distance of 2.8–3.5 AU once every 5 years and 8 months (2,062 days; semi-major axis of 3.17 AU). Its orbit has an eccentricity of 0.11 and an inclination of 10° with respect to the ecliptic.[4] The body's observation arc begins with its official discovery observation at Heidelberg in 1940.[1]

Physical characteristics

Shao is an assumed carbonaceous C-type asteroid.[2]

Rotation period

In July 2013, a rotational lightcurve of Shao was obtained from photometric observations by Italian amateur astronomer Silvano Casulli. Lightcurve analysis gave a rotation period of 7.452 hours with a brightness variation of 0.15 magnitude (Шаблон:Small).[5] A second lightcurve by astronomers at the Palomar Transient Factory from December 2014, gave a shorter period of 5.61 hours and an amplitude of 0.11 (Шаблон:Small), indicative for a rather spherical shape.[2][6]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Shao measures between 24.083 and 25.46 kilometers in diameter and its surface has an albedo between 0.0994 and 0.115.[7][8][9] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057, and calculates a diameter of 29.21 kilometers based on an absolute magnitude of 11.4.[2]

Naming

This minor planet was named after Chinese astronomer Cheng-yuan Shao (born 1927), an assistant to Richard McCrosky (see previously numbered Шаблон:MoMP) in Harvard's minor-planet program at the Harvard–Smithsonian Center for Astrophysics and Oak Ridge Observatory in Massachusetts, United States. Shao was also involved in the recovery of near-Earth asteroid 1862 Apollo.[1] The official Шаблон:MoMP was published by the Minor Planet Center on 20 February 1976 (Шаблон:Small).[10]

References

Шаблон:Reflist

External links

Шаблон:Use dmy dates Шаблон:Minor planets navigator Шаблон:Small Solar System bodies

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  1. ↑ 1,0 1,1 1,2 1,3 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  2. ↑ 2,0 2,1 2,2 2,3 Ошибка цитирования Неверный тег <ref>; для сносок lcdb не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Ferret не указан текст
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок geneva-obs не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Chang-2016 не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Masiero-2011 не указан текст
  8. ↑ Ошибка цитирования Неверный тег <ref>; для сносок WISE не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AKARI не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок DoMP-Circular-dates не указан текст
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