Английская Википедия:(15692) 1984 RA

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Шаблон:Infobox planet

Шаблон:Mp, provisional designation Шаблон:Mp, is a Hungaria asteroid from the innermost regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 1 September 1984, by Italian astronomer Maria Barucci at the Palomar Observatory in California, United States.[1] The presumed E-type asteroid has a longer-than average rotation period of 37.4 hours and possibly an elongated shape.[2]

Orbit and classification

Шаблон:Mp is a bright core member of the Hungaria family (Шаблон:Small),[3] a large family of three thousand asteroids located within the dynamical group with the same name.[1][2] Hungarias form the innermost dense concentration of asteroids in the Solar System; they are inside the asteroid belt's core region, sometimes considered a completely independent population.[4]

The asteroid orbits the Sun in the innermost asteroid belt at a distance of 1.7–2.1 AU once every 2 years and 8 months (977 days; semi-major axis of 1.93 AU). Its orbit has an eccentricity of 0.10 and an inclination of 23° with respect to the ecliptic.[5] The body's observation arc begins with a precovery found in the Digitized Sky Survey and taken at the Siding Spring Observatory in November 1977, almost 7 years prior to its official discovery observation at Palomar.[1]

Physical characteristics

Шаблон:Mp is an assumed E-type asteroid, known for their high albedos, typically around 0.4.[2]

Rotation period

In July 2013, a rotational lightcurve of this asteroid was obtained from photometric observations by American astronomer Brian Warner at the Palmer Divide Station Шаблон:Obscode in California. Lightcurve analysis gave a long rotation period of 37.44 hours with a brightness amplitude of 0.66 magnitude, indicative of an elongated shape (Шаблон:Small).[6]Шаблон:Efn While not being a slow rotator, Шаблон:Mp has a significantly longer period than most asteroids, which rotate once every 2 to 20 hours around their axis.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, this asteroid measures 1.728 kilometers in diameter and its surface has an exceptionally high albedo of 0.78.[7][8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 – a compromise value between the E- (0.40) and S-type (0.20) members of the Hungaria family and group, respectively – and calculates a diameter of 2.43 kilometers based on an absolute magnitude of 15.0.[2]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 26 July 2000 (Шаблон:Small).[9] As of 2018, it has not been named.[1]

Notes

Шаблон:Notelist

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 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 Warner-2014a 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 MPC-Circulars-Archive не указан текст
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