(21791) Mattweegman Main-belt Asteroid
Discovered on 29 September 1999 by LINEAR at Socorro.
Matt Moraco Weegman (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for his environmental sciences team project. He attends the Winona Senior High School, Winona, Minnesota, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Mattweegman is today
Seen from above the solar system on 2026-10-14: Mattweegman is 2.68 au from the Sun and 3.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21791 |
| Provisional designation | 1999 SR7 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.35 km (#14,347 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.286 |
| Absolute magnitude (H) | 14.51 |
| Orbital period | 3.67 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 2.02 – 2.73 au |
| Eccentricity | 0.150 |
| Inclination | 7.60° |
| Closest distance between its orbit and Earth's (MOID) | 1.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Matt
All asteroids named after someone called Matt
Also discovered on 29 September 1999
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- (20617) Richardgreenwood
- (20618) Daniebutler
- (21789) Frankwasser
- (21795) Masi
- (22889) Donnablaney
- (22890) Ruthaellis
- (33789) Sharmacam
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- (121330) Colbygoodloe
- (121332) Jasonhair
- (129879) Tishasaltzman