(21665) Frege
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Asteroid (21665) Frege |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.2719 AU |
| eccentricity | 0.1258 |
| Perihelion - aphelion | 1.9860 AU - 2.5578 AU |
| Inclination of the orbit plane | 2.8671 ° |
| Length of the ascending node | 309.1360 ° |
| Argument of the periapsis | 287.7247 ° |
| Sidereal period | 3.42 a |
| Mean orbital velocity | 19.76 km / s |
| Physical Properties | |
| Absolute brightness | 15.7 mag |
| history | |
| Explorer | Paul G. Comba |
| Date of discovery | September 5, 1999 |
| Another name | 1999 RR 1 , 1984 BK 2 |
| 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. | |
(21665) Frege is an asteroid of the main belt , which on 5 September 1999 by the American Italo- astronomer Paul G. Comba at Prescott Observatory ( IAU code in 684) Arizona was discovered.
The asteroid was named on May 9, 2001 after the German mathematician , logician and philosopher Gottlob Frege (1848–1925), who is considered one of the main pioneers of analytical philosophy .
See also
Web links
- Asteroid Frege: Discovery Circumstances according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
- (21665) Frege in the Small-Body Database of the Jet Propulsion Laboratory (English).
- (21665) Frege in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).