(21607) Robel Main-belt Asteroid
Discovered on 6 April 1999 by LINEAR at Socorro.
Alexander Abram Robel (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his earth science project. He attends the Maritime and Science Technology Academy, Miami, Florida, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robel is today
Seen from above the solar system on 2026-10-14: Robel is 2.46 au from the Sun and 2.75 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21607 |
| Provisional designation | 1999 GG34 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 12.1 hours |
| Absolute magnitude (H) | 13.25 |
| Orbital period | 4.39 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.41 – 2.96 au |
| Eccentricity | 0.102 |
| Inclination | 9.07° |
| Closest distance between its orbit and Earth's (MOID) | 1.41 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alexander
- (1688) Wilkens
- (4837) Bickerton
- (6941) Dalgarno
- (7660) Alexanderwilson
- (8479) Held
- (8486) Asherschel
- (8795) Dudorov
- (11781) Alexroberts
- (15434) Mittal
- (15608) Owens
- (17073) Alexblank
- (21397) Leontovich
All asteroids named after someone called Alexander
Also discovered on 6 April 1999
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- (11211) Saxena
- (16043) Yichenzhang
- (16044) Kurtbachmann
- (17056) Boschetti
- (17073) Alexblank
- (17930) Kennethott
- (17932) Viswanathan
- (19534) Miyagi
- (31628) Vorperian
- (31630) Jennywang
- (31639) Bodoni