(2145) Blaauw
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Asteroid (2145) Blaauw |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Major semi-axis | 3.2192 AU |
| eccentricity | 0.0959 |
| Perihelion - aphelion | 2.9105 AU - 3.5280 AU |
| Inclination of the orbit plane | 15.0090 ° |
| Length of the ascending node | 264.3692 ° |
| Argument of the periapsis | 278.6032 ° |
| Sidereal period | 5.78 a |
| Mean orbital velocity | 16.60 km / s |
| Physical Properties | |
| Medium diameter | 34.20 (± 1.9) km |
| Albedo | 0.0869 (± 0.010) |
| Rotation period | 12,141 (± 30%) h |
| Absolute brightness | 10.8 mag |
| history | |
| Explorer | Richard Martin West |
| Date of discovery | October 24, 1976 |
| Another name | 1976 UF , 1929 XS, 1963 RK, 1980 TW |
| 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. | |
(2145) Blaauw is an asteroid of the main outer belt discovered on October 24, 1976 by the Danish astronomer Richard Martin West at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809). There had been unconfirmed sightings of the asteroid before: on December 24, 1929 (1929 XS) at the Lowell Observatory in Arizona and in September 1963 (1963 RK) at the Karl Schwarzschild Observatory in the Tautenburg Forest .
The mean diameter of the asteroid is 34.20 (± 1.9) km, the surface is with an albedo of 0.0869 (± 0.010) darker than any planetary surface in the solar system on average. The rotation period was investigated by a team from the Rose-Hulman Institute of Technology in Terre Haute , Indiana , using images taken February 11-23, 2012 with the 50 cm Ritchey-Chrétien telescope at the Oakley Southern Sky Observatory in Coonabarabran , New South Wales had been made. The analyzes showed a rotation period of 12.141 (± 0.003) hours. However, the result has an uncertainty of up to 30 percent.
(2145) Blaauw was named on July 1, 1979 at the suggestion of Richard Martin West after the Dutch astronomer Adriaan Blaauw (1914-2010).
Web links
- (2145) Blaauw in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2145) Blaauw in the Small-Body Database of the Jet Propulsion Laboratory (English).
Individual evidence
- ↑ (2145) Blaauw at the IAU Minor Planet Center (English)
- ↑ Richard Ditteon, Patricia Moravec, Joseph Cochren, Michael Gerhardt, Andrew Harris, Ryan Karnemaat, Elizabeth Melton, Kellen Stolze, Josh West: Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2012 January – April . The Minor Planet Bulletin 39, 2012, pp. 213ff. bibcode : 2012MPBu ... 39..213M (English)
- ↑ ESO Planets Named . The Messenger 18, page 30, bibcode : 1979Msngr..18 ... 30W (English)
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names. Springer, Heidelberg 2003, 5th edition, page 174 (English)