(2209) Tianjin
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Asteroid (2209) Tianjin |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Asteroid family | Koronis family |
| Major semi-axis | 2.8455 AU |
| eccentricity | 0.0662 |
| Perihelion - aphelion | 2.6572 AU - 3.0338 AU |
| Inclination of the orbit plane | 2.611 ° |
| Sidereal period | 4,800 a |
| Mean orbital velocity | 17.66 km / s |
| Physical Properties | |
| Medium diameter | 16.44 km |
| Albedo | 0.285 |
| Rotation period | 9.470 h |
| Absolute brightness | 11.109 likes |
| history | |
| Explorer | Purple Mountain Observatory |
| Date of discovery | October 28, 1978 |
| Another name | 1978 US 1 , 1927 CC, 1935 WC |
| 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. | |
(2209) Tianjin is an asteroid of the main belt , which on 28 October 1978 at the Purple Mountain Observatory in Nanjing was discovered.
The asteroid is named after the Chinese city of Tianjin .