(21431) Amberhess Main-belt Asteroid
Discovered on 31 March 1998 by LINEAR at Socorro.
Amber Irish Hess (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for her chemistry project. She attends the Robert Louis Stevenson School, Pebble Beach, California.Naming citation (20050224/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Amberhess is today
Seen from above the solar system on 2026-10-14: Amberhess is 2.29 au from the Sun and 3.25 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21431 |
| Provisional designation | 1998 FR113 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.43 km (#16,402 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.249 |
| Absolute magnitude (H) | 15.28 |
| Orbital period | 3.58 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 2.08 – 2.60 au |
| Eccentricity | 0.110 |
| Inclination | 6.19° |
| Closest distance between its orbit and Earth's (MOID) | 1.07 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Amber
All asteroids named after someone called Amber
Also discovered on 31 March 1998
- (9458) Beaumont
- (9459) Gracecai
- (11178) Emmajoy
- (11179) Ahmadperez
- (11180) Brentperlman
- (11697) Estrella
- (11698) Fichtelman
- (11701) Madeleineyang
- (11702) Mifischer
- (12506) Pariser
- (12508) Darcysloe
- (12509) Pathak