(12757) Yangtze
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Asteroid (12757) Yangtze |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Koronis family |
| Major semi-axis | 2.9135 AU |
| eccentricity | 0.0782 |
| Perihelion - aphelion | 2.6856 AU - 3.1414 AU |
| Inclination of the orbit plane | 1.0539 ° |
| Length of the ascending node | 221.1486 ° |
| Argument of the periapsis | 109.9907 ° |
| Sidereal period | 4.97 a |
| Physical Properties | |
| Absolute brightness | 13.4 mag |
| history | |
| Explorer | Henri Debehogne , Eric Walter Elst |
| Date of discovery | September 14, 1993 |
| Another name | 1993 RY 1 , 1978 QM 1 , 1992 LQ 2 , 1998 RE 55 |
| 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. | |
(12757) Yangtze is an asteroid of the main outer belt that was discovered on February 24, 1987 by the Belgian astronomers Henri Debehogne and Eric Walter Elst at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809). The asteroid had already been sighted: on August 31, 1979 under the provisional designation 1978 QM 1 at the Crimean Observatory in Nautschnyj and on June 3, 1992 (1992 LQ 2 ) at the La Silla Observatory.
The asteroid is a member of the Koronis family, a group of asteroids named after (158) Koronis . The timeless (non- osculating ) orbital elements of (12757) Yangtze are almost identical to those of the smaller, if one assumes the absolute brightness of 15.1 compared to 13.4, asteroids (78885) 2003 SZ 11 .
While almost all asteroids of the Koronis family are asteroids with the spectral class S , according to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), Gianluca Masi , Sergio Foglia and Richard P. Binzel contributed to a spectroscopic investigation (12757) Yangtze assumed a dark surface, so it could roughly be a C-asteroid .
(12757) Yangtze was named on November 6, 2004 after the Yangtze River , the longest river in Asia and the third longest river in the world after the Nile and Amazon . Yangtze is the English name of the river.
See also
Web links
- (12757) Yangtze in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (12757) Yangtze in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances of (12757) Yangtze according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (12757) Yangtze at the IAU Minor Planet Center (English)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ^ 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)