(129138) Williamfrost Main-belt Asteroid
Discovered on 13 January 2005 by CSS at Catalina.
William A. Frost (b. 1976) is the Lockheed Martin system test engineering lead for the OSIRIS-REx Asteroid Sample Return Mission. Prior to serving in this role, he supported the MAVEN mission to Mars, the GRAIL lunar mission, the GLM program and the TIROS program.Naming citation (MPC batch dated 2016-08-18), IAU / Minor Planet Center, via NASA/JPL
Where Williamfrost is today
Seen from above the solar system on 2026-10-14: Williamfrost is 2.36 au from the Sun and 2.84 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 129138 |
| Provisional designation | 2005 AN38 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.64 |
| Orbital period | 4.10 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 2.10 – 3.02 au |
| Eccentricity | 0.180 |
| Inclination | 3.82° |
| Closest distance between its orbit and Earth's (MOID) | 1.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called William
- (1853) McElroy
- (2220) Hicks
- (3445) Pinson
- (3894) Williamcooke
- (4137) Crabtree
- (4423) Golden
- (4838) Billmclaughlin
- (5345) Boynton
- (5763) Williamtobin
- (6012) Williammurdoch
- (6613) Williamcarl
- (6756) Williamfeldman
All asteroids named after someone called William
Also discovered on 13 January 2005
- (117430) Achosyx
- (117439) Rosner
- (129137) Hippolochos
- (134146) Pronoybiswas
- (184280) Yperion
- (211977) Springob
- (214136) Alinghi
- (242529) Hilaomar
- (248183) Peisandros
- (280642) Doubs