(2991) Bilbo
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Asteroid (2991) Bilbo |
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| (2991) Bilbo | |
| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt |
| Major semi-axis | 2.3376 ± 0.0001 AU |
| eccentricity | 0.2207 ± 0.0003 |
| Perihelion - aphelion | 1.8217 ± 0.0008 AU - 2.8535 ± 0.0001 AU |
| Inclination of the orbit plane | 5.1518 ± 0.0359 ° |
| Length of the ascending node | 96.6096 ± 0.4448 ° |
| Argument of the periapsis | 198.0461 ± 0.4526 ° |
| Time of passage of the perihelion | 13th August 2018 |
| Sidereal period | 3.57 a ± 0.0759 d |
| Physical Properties | |
| Medium diameter | 7.878 ± 0.147 km |
| Albedo | 0.115 ± 0.013 |
| Rotation period | 4.0637 h |
| Absolute brightness | 13.6 mag |
| history | |
| Explorer |
 Martin Watt
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| Date of discovery | April 21, 1982 |
| Another name | 1982 HV ; 1975 JC; 1979 SY 3 ; 1982 KB 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. | |
(2991) Bilbo ( 1982 HV ; 1975 JC ; 1979 SY 3 ; 1982 KB 2 ) is an approximately eight kilometers large asteroid of the main inner belt that was discovered on April 21, 1982 by the American astronomer Martin Watt at the La Silla Observatory on Lowell Observatory , Anderson Mesa Station ( Anderson Mesa ) near Flagstaff , Arizona ( IAU code 688).
designation
(2991) Bilbo was named after Bilbo Baggins , a character in The Hobbit by JRR Tolkien , after whom the asteroid (2675) Tolkien is named. The naming was suggested by the American astronomer GV Williams .
See also
Web links
- (2991) Bilbo in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2991) Bilbo in the Small-Body Database of the Jet Propulsion Laboratory (English).
Individual evidence
- ^ Lutz D. Schmadel : Dictionary of Minor Planet Names . Fifth Revised and Enlarged Edition. Ed .: Lutz D. Schmadel. 5th edition. Springer Verlag , Berlin , Heidelberg 2003, ISBN 978-3-540-29925-7 , pp. 186 (English, 992 pp., Link.springer.com [ONLINE; accessed on September 29, 2019] Original title: Dictionary of Minor Planet Names . First edition: Springer Verlag, Berlin, Heidelberg 1992): “1982 HV. Discovered 1982 Apr. 21 by M. Watt at Anderson Mesa. "
| predecessor | asteroid | successor |
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| (2990) Trimberger | numbering | (2992) Vondel |