1240 Centenaria
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1240 Centenaria, provisional designation Template:Mp, is a background asteroid from the outer regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 5 February 1932, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg, Germany.[1] The assumed C-type asteroid has a rotation period of 11.3 hours.[2] It was named for the 100th anniversary of the discovering observatory.[3]
Orbit and classification
Centenaria is a non-family asteroid from the main belt's background population.[4][5] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.4 AU once every 4 years and 10 months (1,773 days; semi-major axis of 2.87 AU). Its orbit has an eccentricity of 0.18 and an inclination of 10° with respect to the ecliptic.[6] The asteroid was first observed as Template:Mp at the United States Naval Observatory in September 1915. The body's observation arc begins at Lowell Observatory in December 1930, or 14 months prior to its official discovery observation at Bergedorf.[1]
Naming
This minor planet was named Centenaria to celebrate the 100th anniversary of the discovering Bergedorf Observatory on 31 October 1933. The official Template:MoMP was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 114Script error: No such module "Check for unknown parameters".).[3]
Physical characteristics
Centenaria is an assumed carbonaceous C-type asteroid.[2] The asteroid's determined geometric albedo agrees with a characterization into the C-complex (see below).
Rotation period
In July 2007, a rotational lightcurve of Centenaria was obtained from photometric observations by Julian Oey at the Kingsgrove Observatory Template:Obscode in Australia. Lightcurve analysis gave a rotation period of Script error: No such module "val". hours with a brightness variation of 0.20 magnitude (U=3Script error: No such module "Check for unknown parameters".).[7] The result supersedes previous period determinations of 11.2 hours with and amplitude of 0.12 by Laurent Bernasconi in March 2005 (U=2-Script error: No such module "Check for unknown parameters".),[8] and a period of 14 hours by Mario Di Martino at Pino Torinese in September 1983 (U=1Script error: No such module "Check for unknown parameters".).[9]
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, Centenaria measures between 50 and 71 kilometers in diameter and its surface has an albedo between 0.046 and 0.072.[10][11][12][13][14][15] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0469 and a diameter of 58.61 kilometers based on an absolute magnitude of 10.1.[2] An asteroid occultation from July 2007 measured as cross-section of Script error: No such module "val"..[4]
References
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- ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Script error: No such module "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
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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