(5516) Jawilliamson
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Asteroid (5516) Jawilliamson |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Major semi-axis | 2.5849 AU |
| eccentricity | 0.1675 |
| Perihelion - aphelion | 2.1518 AU - 3.0179 AU |
| Inclination of the orbit plane | 12.9802 ° |
| Length of the ascending node | 160.2750 ° |
| Argument of the periapsis | 38.1591 ° |
| Sidereal period | 4.16 a |
| Mean orbital velocity | 16.65 km / s |
| Physical Properties | |
| Absolute brightness | 12.9 mag |
| history | |
| Explorer | Eleanor Helin |
| Date of discovery | May 2, 1989 |
| Another name | 1989 JK , 1983 YA, 1990 QJ 7 |
| 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. | |
(5516) Jawilliamson is an asteroid of the main central belt discovered on May 2, 1989 by the American astronomer Eleanor Helin at the Palomar Observatory ( IAU code 675) in California .
According to the SMASS classification ( Small Main-Belt Asteroid Spectroscopic Survey ), a spectroscopic study by Gianluca Masi , Sergio Foglia and Richard P. Binzel at (5516) Jawilliamson assumed a dark surface, so it could, roughly speaking, be trade a C asteroid .
(5516) Jawilliamson was on 26 February 1994, after the US science fiction - writer Jack Williamson named. The suggestion for a name came from the science fiction writer and astrophysicist David Brin , after whom an asteroid (5748) Davebrin is also named, and the science fiction writer Roger Zelazny . Another asteroid named after Jack Williamson is the asteroid of the outer main belt (235281) discovered in 2003 and named in 2011 Jackwilliamson .
Web links
- (5516) Jawilliamson in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (5516) Jawilliamson 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
- ^ Gianluca Masi, Sergio Foglia, Richard P. Binzel: Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog . (English)
- ↑ subdivision of asteroids to S-types, C-types and V-types (English)
- ↑ The Minor Planet Circulars # 22983 of February 26, 1994, page 121 (PDF, English; 1.2 MB)
- ↑ Stephen Haffner, Richard A. Hauptmann: Seventy-Five: The Diamond Anniversary of a Science Fiction Pioneer - Jack Williamson . Haffner Press, Royal Oak 2004, ISBN 978-1-893887-20-6 . Page 583 (English)