(21330) Alanwhitman Main-belt Asteroid
Discovered on 11 January 1997 by Spacewatch at Kitt Peak.
Alan Douglas Whitman (b. 1946) is a Canadian amateur astronomer and former weather service officer. He is a skillful observer and has written and lectured widely. Name suggested by R. and P. Jedicke.Naming citation (MPC batch dated 2016-06-20), IAU / Minor Planet Center, via NASA/JPL
Where Alanwhitman is today
Seen from above the solar system on 2026-10-14: Alanwhitman is 2.84 au from the Sun and 3.73 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21330 |
| Provisional designation | 1997 AT20 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.39 km (#14,238 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.292 |
| Absolute magnitude (H) | 14.68 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.34 – 2.84 au |
| Eccentricity | 0.0967 |
| Inclination | 4.32° |
| Closest distance between its orbit and Earth's (MOID) | 1.34 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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