(6174) Polybius
|
Asteroid (6174) Polybius |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Inarradas group |
| Major semi-axis | 3.0520 AU |
| eccentricity | 0.2214 |
| Perihelion - aphelion | 2.3763 AU - 3.7277 AU |
| Inclination of the orbit plane | 14.6864 ° |
| Length of the ascending node | 21.6864 ° |
| Argument of the periapsis | 301.0378 ° |
| Time of passage of the perihelion | May 4, 2015 |
| Sidereal period | 5.33 a |
| Mean orbital velocity | 17.05 km / s |
| Physical Properties | |
| Medium diameter | 20.61 km (± 0.8) |
| Albedo | 0.0723 (± 0.006) |
| Absolute brightness | 12.0 mag |
| history | |
| Explorer | Norman G. Thomas |
| Date of discovery | 4th October 1983 |
| Another name | 1983 TR 2 , 1976 GA 6 , 1978 RQ 16 |
| 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. | |
(6174) Polybius is a main outer belt asteroid discovered on October 4, 1983 by US astronomer Norman G. Thomas at Anderson Mesa Station ( IAU code 688) of the Lowell Observatory in Coconino County , Arizona . Observations of the asteroid had already been made on April 2, 1976 under the provisional designation 1976 GA 6 at the Crimean Observatory in Nautschnyj and on September 8 and 9, 1978 (1978 RQ 16 ) at the French Observatoire de Calern .
The mean diameter of the asteroid was calculated to be 20.61 km (± 0.8). With an albedo of 0.0723 (± 0.006) it has a rather dark surface, according to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel , the asteroids were subdivided into the spectral classes C, S and V, (6174) Polybius was assigned to the dark C asteroids .
According to the AstDyS-2 database, the asteroid belongs to the Inarradas group, a family of asteroids named after (3438) Inarradas . The orbit of (6174) Polybius around the Sun has a high eccentricity of 0.2214 .
The period of rotation of the asteroid was determined by Brian D. Warner in 2009 and by Adam Waszczak, Chan-Kao Chang, Eran Ofek et al. examined. However, the light curves were not sufficient for a determination.
(6174) Polybius was named on April 4, 1996 after the ancient Greek historian Polybius , who became famous for his main work, the Historíai . Polybius is the Latin and English spelling of his name. As early as 1935, a lunar crater on the eastern front of the moon was named after Polybius: lunar crater Polybius .
See also
Web links
- (6174) Polybius in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (6174) Polybius 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 (6174) Polybius according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ Observations by (6174) Polybius on minorplanetcenter.net (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)
- ↑ The family membership of (6174) Polybius in the AstDyS-2 database (English)
- ↑ The lunar crater Polybios in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS