Английская Википедия:66391 Moshup
Шаблон:Short description Шаблон:Infobox planet
66391 Moshup Шаблон:IPAc-en, provisional designation Шаблон:Mp, is a binary asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately 1.3 kilometers in diameter. It was discovered on 20 May 1999, by Lincoln Near-Earth Asteroid Research (LINEAR) at the Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, United States.[1] It is a Mercury-crosser that comes extremely close to the Sun at a perihelion of 0.2 AU.
Orbit
The asteroid orbits the Sun at a distance of 0.2–1.1 AU once every 6.18 months (188 days). Its orbit has an eccentricity of 0.69 and an inclination of 39° with respect to the ecliptic.[2] A first precovery was taken by 2MASS at the Fred Lawrence Whipple Observatory in 1998, extending the body's observation arc by one year prior to its official discovery observation at Socorro.[1]
As a potentially hazardous asteroid, it has an Earth minimum orbital intersection distance of Шаблон:Convert, or 5.4 lunar distances.[2] On 25 May 2036, it will pass Шаблон:Convert from Earth.[3]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 10 September 2003. It was named from Mohegan legend, after Moshup, a giant who lived in the coastal areas of New England. The asteroid's companion is named Squannit, after the wife of Moshup and a medicine woman of the Makiawisug (little people). The official Шаблон:MoMP was published by the Minor Planet Center on 27 August 2019 (Шаблон:Small).[4]
Physical characteristics
In the SMASS classification, the asteroid a characterized as a stony S-type asteroid.[2]
Satellite
Moshup has a minor-planet moon orbiting it. The moon, named Squannit Шаблон:IPAc-en and designated Шаблон:Mp, is approximately 360 metres in diameter, and orbits its primary every 16 hours at a mean distance of 2.6 kilometers. The presence of a companion was suggested by photometric observations made by Pravec and Šarounová and was confirmed by radar observations from Arecibo, announced on 23 May 2001 (also see below).[5][6] Based on radar imaging, Squannit's dimensions are estimated to be Шаблон:Val meters.[7]
Diameter and shape
According to radiometric observations from Arecibo Observatory, the asteroid has a mean diameter of 1.317 kilometers.[7] The observations were taken from May 21–23, 2001, by Lance A. M. Benner, Steven J. Ostro, Jon D. Giorgini, Raymond F. Jurgens, Jean-Luc Margot and Michael C. Nolan.[7]
The Collaborative Asteroid Lightcurve Link adopts a diameter of 1.3 kilometers and derives an albedo 0.26 with an absolute magnitude of 16.5.[8]
The shapes of the two bodies and their dynamics are complex.[9] With a dimension of approximately Шаблон:Val kilometers for a simple triaxial ellipsoid, the asteroid has an oblate shape, which is dominated by an equatorial ridge at the body's potential-energy minimum. This bizarre property of the equatorial region means that it is close to breakup: raising a particle a meter above the surface would put it into orbit. As seen in the image above, the gravitational effects between the moon and the asteroid create a gigantic mountain extending in the equatorial plane around the entire asteroid. It was the first asteroid to be described as "muffin-shaped",[10] which is now understood to be a very common shape for asteroids in critical rotation,[11] including 101955 Bennu and 162173 Ryugu.
Lightcurves
During 19–27 June 2000, a rotational lightcurve of this asteroid was obtained from photometric observations by Petr Pravec and Lenka Šarounová at Ondřejov Observatory. Lightcurve analysis gave a rotation period of 2.7650 hours with a brightness variation of 0.12 magnitude (Шаблон:Small).[5]
See also
References
External links
- Margot, Jean-Luc, Radar observations of Шаблон:Mp November 1999, retrieved July 2016
- Near-Earth Asteroid Is Two Chunks In One, NASA Jet Propulsion Laboratory, May 2001
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- 1999 KW4 orbit and observations at IAU Minor Planet Center
- Шаблон:NeoDys
- Шаблон:JPL small body
Шаблон:2019 in space Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
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<ref>; для сносокPravec-2006не указан текст - ↑ Ошибка цитирования Неверный тег
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<ref>; для сносокOstro-2006не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокlcdbне указан текст - ↑ NASA Jet Propulsion Laboratory Asteroid Radar Research Шаблон:Webarchive, retrieved May 3, 2007
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite journal
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