(21714) Geoffreywoo Main-belt Asteroid
Discovered on 8 September 1999 by LINEAR at Socorro.
Geoffrey Hubert Woo (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his physics project. He attends the Palos Verdes Peninsula High School, Rolling Hills Estates, California, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Geoffreywoo is today
Seen from above the solar system on 2026-10-14: Geoffreywoo is 2.90 au from the Sun and 3.88 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21714 |
| Provisional designation | 1999 RX109 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.27 km (#6,330 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.258 |
| Rotation period | 3.16 hours |
| Absolute magnitude (H) | 12.8 |
| Orbital period | 4.93 years |
| Semi-major axis | 2.90 au |
| Perihelion – aphelion | 2.80 – 2.99 au |
| Eccentricity | 0.0337 |
| Inclination | 11.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Geoffrey
- (4209) Briggs
- (10289) Geoffperry
- (11753) Geoffburbidge
- (13018) Geoffjames
- (30090) Grossano
- (38431) Jeffbeck
- (132904) Notkin
- (160215) Haines-Stiles
All asteroids named after someone called Geoffrey
Also discovered on 8 September 1999
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- (19629) Serra
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- (20547) Michimani