(4793) Slessor
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Asteroid (4793) Slessor |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Asteroid family | Leonidas group |
| Major semi-axis | 2.6671 AU |
| eccentricity | 0.1581 |
| Perihelion - aphelion | 2.2455 AU - 3.0888 AU |
| Inclination of the orbit plane | 4.3636 ° |
| Length of the ascending node | 155.9191 ° |
| Argument of the periapsis | 62.8204 ° |
| Time of passage of the perihelion | April 11, 2022 |
| Sidereal period | 4.36 a |
| Mean orbital velocity | 18.12 km / s |
| Physical Properties | |
| Medium diameter | 13.177 (± 0.181) km |
| Albedo | 0.063 (± 0.003) |
| Absolute brightness | 13.2 mag |
| history | |
| Explorer | Henri Debehogne |
| Date of discovery | September 1, 1988 |
| Another name | 1988 RR 4 , 1982 BJ 10 , 1982 BY 2 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(4793) Slessor is an asteroid located in the central main belt . It was discovered on September 1, 1988 by the Belgian astronomer Henri Debehogne at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809). The asteroid had already been sighted: on January 19 and 20, 1982 under the provisional designation 1982 BY 2 at the Crimean Observatory in Nautschnyj and on January 27, 1982 (1982 BJ 10 ) at the Kleť Observatory near Český Krumlov .
The mean diameter of the asteroid was calculated to be 13.177 (± 0.181) kilometers and the albedo to be 0.063 (± 0.003). According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel subdivided all investigated asteroids into C, S and V types (4793) Slessor assigned to the C asteroids .
(4793) Slessor is a member of the Leonidas group, an asteroid family named after (2782) Leonidas . In an earlier assignment by the Italian astronomer Vincenzo Zappalà (et al.), This group was defined as the Viblia family in a publication from 1995 (et al.), According to (144) Vibilia . The timeless (non- osculating ) orbital elements of (4793) Slessor are almost identical to those of four smaller asteroids, assuming the absolute magnitude of 14.9, 15.1, 15.9 and 17.7 compared to 13.2, namely (43990) 1997 LN 4 , (123184) 2000 UQ 6 , (146720) 2001 WC 87 and 2006 SP 399 .
(4793) Slessor was named on September 9, 2014 after the Scottish missionary Mary Slessor (1848–1915), who campaigned in Nigeria, among other things, for women's rights and for the Efik to stop killing twins . The name was proposed by a Belgian twin organization on the 100th anniversary of Mary Slessor's death.
Web links
- (4793) Slessor in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (4793) Slessor in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances of (4793) Slessor according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (4793) Slessor at the IAU Minor Planet Center (English)
- ^ Gianluca Masi, Sergio Foglia, Richard P. Binzel: Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog . (English)
- ↑ subdivision of asteroids to S-types, C-types and V-types (English)
- ↑ a b The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ↑ Database with the assignment of 12,487 asteroids to asteroid groups (English)
- ↑ Asteroid Slessor 4793 . Article from May 14, 2015 on maryslessor.org (English)