Английская Википедия:2752 Wu Chien-Shiung

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2752 Wu Chien-Shiung, provisional designation Шаблон:Mp, is an Eoan asteroid from the outer regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 20 September 1965, by astronomers at Purple Mountain Observatory in Nanking, China.[1] The asteroid has a long rotation period of 36.3 hours.[2] It was named for Chinese-American nuclear physicist Chien-Shiung Wu.[1]

Orbit and classification

Wu Chien-Shiung is a core member of the Eos family (Шаблон:Small),[2][3] one of the largest asteroid families named after 221 Eos.[4] It orbits the Sun in the outer main-belt at a distance of 2.7–3.4 AU once every 5 years and 3 months (1,920 days; semi-major axis of 3.02 AU). Its orbit has an eccentricity of 0.11 and an inclination of 10° with respect to the ecliptic.[5]

The asteroid was first observed as Шаблон:Mp at Heidelberg Observatory in August 1933. The body's observation arc begins as Шаблон:Mp at the Goethe Link Observatory in November 1960, or 5 years prior to its official discovery observation at Nanking.[1]

Physical characteristics

Wu Chien-Shiung is an assumed S-type asteroid, while the overall spectral type for members of the Eos family is that of a K-type.[2][4]Шаблон:Rp

Rotation period

In August 2012, a rotational lightcurve of Wu Chien-Shiung was obtained from photometric observations in the S-band by astronomers with the Palomar Transient Factory in California. Lightcurve analysis gave a long rotation period of 36.343 hours with a brightness amplitude of 0.28 magnitude (Шаблон:Small).[6] While not being a slow rotator with spin rates above 100 hours, Wu Chien-ShiungШаблон:'s period is significantly longer than the average 2 to 20 hours observed for most asteroids.

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, Wu Chien-Shiung measures 15.484 and 16.65 kilometers in diameter and its surface has an albedo of 0.203 and 0.184,[7][8][9] respectively, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for K-type asteroids of 0.14 – derived from the Eos family's parent body – and calculates a diameter of 17.80 kilometers based on an absolute magnitude of 11.5.[2]

Naming

This minor planet was named after Chinese-American nuclear physicist Chien-Shiung Wu (1912–1997), renowned for her research on the separation of uranium isotopes by gaseous diffusion and for the Wu experiment conducted in 1956, for which she was awarded a Wolf Prize in Physics in 1978 (also see list of laureates).[1]

The official naming citation was published by the Minor Planet Center on 11 March 1990 (Шаблон:Small).[10]

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 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. ↑ 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок Nesvorny-2014 не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Waszczak-2015 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 MPC-Circulars-Archive не указан текст
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