(20531) Stevebabcock Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Steven Babcock mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. He teaches at the Beaumont Middle School, Portland, Oregon.Naming citation (20041028/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Stevebabcock is today
Seen from above the solar system on 2026-10-14: Stevebabcock is 2.83 au from the Sun and 2.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20531 |
| Provisional designation | 1999 RW57 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.64 km (#13,616 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.268 |
| Rotation period | 22.6 hours |
| Absolute magnitude (H) | 14.55 |
| Orbital period | 3.67 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 1.93 – 2.83 au |
| Eccentricity | 0.191 |
| Inclination | 2.93° |
| Closest distance between its orbit and Earth's (MOID) | 0.911 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Steven
- (5129) Groom
- (6403) Steverin
- (6544) Stevendick
- (8195) Tamkin
- (9280) Stevenjoy
- (9926) Desch
- (10044) Squyres
- (10596) Stevensimpson
- (12104) Chesley
- (13415) Stevenbland
- (14438) MacLean
- (15941) Stevegauthier
All asteroids named after someone called Steven
Also discovered on 7 September 1999
- (12126) Chersidamas
- (12577) Samra
- (12578) Bensaur
- (12585) Katschwarz
- (12586) Juliaspeyer
- (12588) Arseneau
- (12604) Lisatate
- (12924) Madisonicole
- (13818) Ullery
- (14214) Hirsch
- (15503) Estradioto
- (16067) Brandonfan