(20631) Stefuller Main-belt Asteroid
Discovered on 2 October 1999 by LINEAR at Socorro.
Stephen Fuller (b. 1986) was awarded first place in the 2004 Intel International Science and Engineering Fair for his biochemistry team project. He attends the Hilton Head Preparatory School, Hilton Head Island, South Carolina, U.S.A.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Stefuller is today
Seen from above the solar system on 2026-10-14: Stefuller is 2.59 au from the Sun and 3.54 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20631 |
| Provisional designation | 1999 TW91 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.33 km (#14,404 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.481 |
| Rotation period | 12.2 hours |
| Absolute magnitude (H) | 14.07 |
| Orbital period | 3.59 years |
| Semi-major axis | 2.34 au |
| Perihelion – aphelion | 2.03 – 2.66 au |
| Eccentricity | 0.134 |
| Inclination | 7.36° |
| 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 Stephen
- (5190) Fry
- (5191) Paddack
- (5292) Mackwell
- (5657) Groombridge
- (7336) Saunders
- (7672) Hawking
- (8373) Stephengould
- (9768) Stephenmaran
- (9891) Stephensmith
- (10287) Smale
- (10315) Brewster
- (12984) Lowry
All asteroids named after someone called Stephen
Also discovered on 2 October 1999
- (12929) Periboea
- (12935) Zhengzhemin
- (13406) Sekora
- (16087) Rhythmgarg
- (16094) Scottmccord
- (20629) Robert
- (20632) Carlyrosser
- (20633) Robertluther
- (20634) Marichardson
- (20635) Robinandrews
- (20636) Romanhirsch
- (21801) Ancerl