Английская Википедия:735 Marghanna

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735 Marghanna (prov. designation: Шаблон:Mp or Шаблон:Mp) is a large carbonaceous background asteroid from the central regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 9 December 1912, by German astronomer Heinrich Vogt at the Heidelberg-Königstuhl State Observatory in southwest Germany.[1] The dark C-type asteroid (Ch) has a rotation period of 20.6 hours and is rather regular in shape. It was named after Margarete Vogt and after Hanna, the mother and a relative of the discoverer, respectively.[2]

Orbit and classification

Marghanna is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[3][4][5] It orbits the Sun in the central asteroid belt at a distance of 1.9–3.6 AU once every 4 years and 6 months (1,647 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.32 and an inclination of 17° with respect to the ecliptic.[6] The body's observation arc begins at Heidelberg Observatory on 29 November 1921, almost nine years after its official discovery observation.[1]

Naming

This minor planet was named by the discoverer Heinrich Vogt after his mother Margarete Vogt and after one of his relatives, Hanna. The Шаблон:MoMP was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small).[2]

Physical characteristics

In the Tholen classification and in the SDSS-based taxonomy, Marghanna is a common, carbonaceous C-type asteroid, while in the Bus–Binzel SMASS classification, it is a hydrated C-type (Ch).[6][4][7]

Rotation period

In May 2011, a rotational lightcurve of Marghanna was obtained from photometric observations by American astronomer Brian Skiff and collaborators using telescopes at the Lowell Observatory in Flagstaff, Arizona. The 2019-revised lightcurve analysis gave a well-defined rotation period of (Шаблон:Val) hours with a small brightness variation of (Шаблон:Val) magnitude, indicative of a rather spherical shape (Шаблон:Small).[8] Lower rated measurements determined a period of 15.95 hours (Rafa Mohamed, 1995),[9] 24 hours (Raymond Poncy, 2005)[10] and Шаблон:Val hours (Brian Skiff, 2014) with an amplitude of Шаблон:Val, Шаблон:Val and Шаблон:Val magnitude, respectively (Шаблон:Small).[11]

Diameter and albedo

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Marghanna measures (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val) kilometers in diameter and its surface has an albedo of (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val), respectively.[12][13][14]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0423 and a diameter of 74.23 kilometers based on an absolute magnitude of 9.7,[11] while the Cornell Mid-IR Asteroid Spectroscopy (MIDAS) survey determined a diameter of (Шаблон:Val) kilometers and Benoit Carry one of (Шаблон:Val) kilometers.[15][16] Alternative mean-diameters published by the WISE team include (Шаблон:Val), (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val) with a corresponding albedo of (Шаблон:Val), (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val).[4][11]

Two asteroid occultations on 11 March 2008 and on 4 May 2010, gave a best-fit ellipse dimension of (Шаблон:Val) and (Шаблон:Val), respectively, each with an intermediate quality rating of 2.[4] These timed observations are taken when the asteroid passes in front of a distant star.[4]

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 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  2. ↑ 2,0 2,1 Ошибка цитирования Неверный тег <ref>; для сносок springer не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AstDys-object не указан текст
  4. ↑ 4,0 4,1 4,2 4,3 4,4 Ошибка цитирования Неверный тег <ref>; для сносок Ferret не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Zappala-family не указан текст
  6. ↑ 6,0 6,1 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок SDSS-Taxonomy не указан текст
  8. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Skiff-2019a не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Mohamed-1995 не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок geneva-obs не указан текст
  11. ↑ 11,0 11,1 11,2 Ошибка цитирования Неверный тег <ref>; для сносок lcdb не указан текст
  12. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Mainzer-2016 не указан текст
  13. ↑ Ошибка цитирования Неверный тег <ref>; для сносок SIMPS не указан текст
  14. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AKARI не указан текст
  15. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Carry-2012 не указан текст
  16. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Lim-2005 не указан текст
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