(43501) Oldroyd Main-belt Asteroid
Discovered on 1 February 2001 by LONEOS at Anderson Mesa.
William J. Oldroyd (b. 1992) is an American planetary scientist and a postdoctoral Scholar at Northern Arizona University (NAU). His 2022 Ph.D. dissertation, also from NAU, investigated dynamical relationships between a hypothesized planet in the outer solar system and its gravitational effect on other distant minor planets.Naming citation (WGSBN Bull. 3, #9, 38), IAU / Minor Planet Center, via NASA/JPL
Where Oldroyd is today
Seen from above the solar system on 2026-10-14: Oldroyd is 2.73 au from the Sun and 1.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 43501 |
| Provisional designation | 2001 CW22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.09 km (#16,940 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.370 |
| Absolute magnitude (H) | 15.34 |
| Orbital period | 3.87 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.10 – 2.83 au |
| Eccentricity | 0.149 |
| Inclination | 3.67° |
| Closest distance between its orbit and Earth's (MOID) | 1.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called William
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- (2220) Hicks
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- (5763) Williamtobin
- (6012) Williammurdoch
- (6613) Williamcarl
- (6756) Williamfeldman
All asteroids named after someone called William
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