Английская Википедия:1354 Botha
Шаблон:Short description Шаблон:Infobox planet
1354 Botha, provisional designation Шаблон:Mp, is an exceptionally dark background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 3 April 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[1] The asteroid was named after South African prime minister Louis Botha.[2]
Orbit and classification
Botha is a non-family asteroid of the main belt's background population.[3] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.8 AU once every 5 years and 6 months (2,017 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.22 and an inclination of 6° with respect to the ecliptic.[4]
The asteroid was first identified as Шаблон:Mp at Heidelberg Observatory in September 1929. The body's observation arc begins at with its identification as Шаблон:Mp at Simeiz Observatory in October 1931, more than three years prior to its official discovery observation at Johannesburge.[1]
Physical characteristics
Botha is an assumed carbonaceous C-type asteroid.[5]
Rotation period
In September 2003, a fragmentary rotational lightcurve of Botha was obtained from photometric observations by Swiss astronomers Stefano Sposetti and Raoul Behrend. Lightcurve analysis gave a tentative rotation period of 4 hours with a brightness amplitude of 0.21 magnitude (Шаблон:Small).[6] As of 2017, no secure period has been obtained.[5]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Botha measures between 38.41 and 70.34 kilometers in diameter and its surface has an albedo between 0.014 and 0.05.[7][8][9][10][11][12]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0295 and a diameter of 48.82 kilometers based on an absolute magnitude of 11.0.[5]
Naming
This minor planet was named after Louis Botha (1862–1919), the first Prime Minister of South Africa of the Union of South Africa, which existed between 1910 and 1961.[2] The official Шаблон:MoMP was published by the Minor Planet Center in April 1953 (Шаблон:Small).[13]
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Use dmy dates Шаблон:Minor planets navigator Шаблон:Small Solar System bodies
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