(7859) Lhasa
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Asteroid (7859) Lhasa |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Major semi-axis | 2.7618 AU |
| eccentricity | 0.1362 |
| Perihelion - aphelion | 2.3858 AU - 3.1379 AU |
| Inclination of the orbit plane | 3.7494 ° |
| Length of the ascending node | 8.2714 ° |
| Argument of the periapsis | 35.3479 ° |
| Sidereal period | 4.59 a |
| Mean orbital velocity | 17.92 km / s |
| Physical Properties | |
| Medium diameter | 16.00 km (± 1.7) |
| Albedo | 0.0330 (± 0.008) |
| Absolute brightness | 13.30 mag |
| history | |
| Explorer | Antonin Mrkos |
| Date of discovery | 19th October 1979 |
| Another name | 1979 US , 1974 RG, 1981 ET 1 , 1993 WP |
| 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. | |
(7859) Lhasa is an asteroid of the central main belt , which was discovered on October 19, 1979 by the Czech astronomer Antonín Mrkos at the Kle Observ Observatory ( IAU code 046) near Český Krumlov . There had been unconfirmed sightings of the asteroid before, for example with the provisional designation 1974 RG on September 11, 1974 at the Crimean Observatory in Nautschnyj .
The asteroid has a mean diameter of 16.00 (± 1.7) km and with an albedo of 0.0330 (± 0.008) has a very dark surface that is blacker than coal, even blacker than that of the asteroid, for example ( 253) Mathilde . The surface has an average reflectance value that is comparable to black toner powder .
Mean distance from the Sun ( major semi-axis ), eccentricity and inclination of the orbit plane of (7859) Lhasa roughly correspond to the Dora family, a group of asteroids named after (668) Dora .
The asteroid is named after the Tibetan capital Lhasa . (7859) Lhasa was named by the International Astronomical Union (IAU) on May 23, 2000 at the suggestion of the Czech astronomer couple Jana Tichá and Miloš Tichý .
Web links
- (7859) Lhasa in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (7859) Lhasa in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
Individual evidence
- ↑ Observations from (7859) Lhasa on minorplanetcenter.net (English)
- ↑ Entry of the asteroid on the website of the Kleť Observatory (English)