(77185) Cherryh
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Asteroid (77185) Cherryh |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Major semi-axis | 2.5972 AU |
| eccentricity | 0.1744 |
| Perihelion - aphelion | 2.1443 AU - 3.0501 AU |
| Inclination of the orbit plane | 3.1450 ° |
| Length of the ascending node | 231.3925 ° |
| Argument of the periapsis | 164.2670 ° |
| Time of passage of the perihelion | 3rd July 2018 |
| Sidereal period | 4.19 a |
| Mean orbital velocity | 18.34 km / s |
| Physical Properties | |
| Medium diameter | 3.985 (± 0.166) km |
| Albedo | 0.049 (± 0.009) |
| Absolute brightness | 15.9 mag |
| history | |
| Explorer | Don J. Wells , Alex Cruz |
| Date of discovery | March 20, 2001 |
| Another name | 2001 FE 9 , 1998 TG 27 |
| 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. | |
(77185) Cherryh is an asteroid located in the central main belt . It was discovered on March 20, 2001 by the American amateur astronomers Don J. Wells and Alex Cruz at the George Observatory ( IAU code 735). The George Observatory is part of the Houston Museum of Natural Science and is located in Brazos Bend State Park in the Houston suburb of Needville . The asteroid had previously been sighted on October 15 and 20, 1998 at the Steward Observatory's remote station on Kitt Peak .
The mean diameter of the asteroid was calculated to be 3.985 (± 0.166) kilometers and the albedo to be 0.049 (± 0.009). 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 examined asteroids into C, S and V types (77185) Cherryh assigned to the C asteroids .
The mean distance from the Sun ( major semi-axis ), eccentricity and inclination of the orbit plane of the asteroid roughly correspond to the Eunomia family, a group named after (15) Eunomia , to which probably five percent of the asteroids in the main belt belong. However, the dark albedo of (77185) Cherryh does not match the Eunomia family.
(77185) Cherryh was named on July 13, 2004 after the American science fiction and fantasy writer CJ Cherryh (* 1942).
Web links
- (77185) Cherryh in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (77185) Cherryh 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 (77185) Cherryh according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (77185) Cherryh 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)