(21400) Ahdout Main-belt Asteroid
Discovered on 20 March 1998 by LINEAR at Socorro.
Zimra Payvand Ahdout (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her chemistry team project. She attends the Roslyn High School, Roslyn Heights, New York, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ahdout is today
Seen from above the solar system on 2026-10-14: Ahdout is 2.00 au from the Sun and 2.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21400 |
| Provisional designation | 1998 FM57 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 4.17 hours |
| Absolute magnitude (H) | 15.44 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 1.85 – 2.78 au |
| Eccentricity | 0.201 |
| Inclination | 3.61° |
| Closest distance between its orbit and Earth's (MOID) | 0.836 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 20 March 1998
- (8744) Cilla
- (8745) Delaney
- (8954) Baral
- (9126) Samcoulson
- (9243) Alag
- (9454) Ardeishar
- (11169) Alkon
- (11170) Bradenmilford
- (11173) Jayanderson
- (11174) Carandrews
- (11176) Batth
- (11685) Adamcurry