Английская Википедия:1817 Katanga
1817 Katanga, provisional designation Шаблон:Mp, is a stony Phocaea asteroid in from the inner regions of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 20 June 1939, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa.[1] It is named for the Katanga Province.[2]
Orbit and classification
The S-type asteroid is a member of the Phocaea family, a smaller population of asteroids with similar orbital characteristics named after their largest member, 25 Phocaea. Katanga orbits the Sun in the inner main-belt at a distance of 1.9–2.8 AU once every 3 years and 8 months (1,334 days). Its orbit has an eccentricity of 0.19 and an inclination of 26° with respect to the ecliptic.[3] KatangaШаблон:'s observation arc begins with its official discovery observation in 1939, as its first observation made at Heidelberg Observatory in 1928, remained unused (Шаблон:Mp).[1]
Lightcurves
In April 2008, a rotational lightcurve of Katanga was obtained from photometric observations by American astronomer Brian D. Warner at his Palmer Divide Observatory in Colorado. It gave a rotation period of 8.481 hours with a brightness variation of 0.30 magnitude (Шаблон:Small).[4] The quality of this result supersedes two periods previously obtained by astronomers Stefano Sposetti and Glenn Malcolm in May and June 2001, respectively (Шаблон:Small).[5][6]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Katanga measures between 9.76 and 15.90 kilometers in diameter, and its surface has an albedo between 0.133 and 0.353.[7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.242 and a diameter of 16.28 kilometers with an absolute magnitude of 11.1.[10]
Naming
This minor planet was named after the Katanga Province, a rich mining region in the Democratic Republic of the Congo in Central Africa.[2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 (Шаблон:Small).[11]
References
External links
- Lightcurve plot of 1817 Katanga, Palmer Divide Observatory, B. D. Warner (2008)
- 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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- Английская Википедия
- Phocaea asteroids
- Discoveries by Cyril Jackson (astronomer)
- Named minor planets
- Astronomical objects discovered in 1939
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