(23172) Williamartin Main-belt Asteroid
Discovered on 29 April 2000 by LINEAR at Socorro.
William Campbell Martin (b. 1989) was awarded first place and Best in Category in the 2007 Intel International Science and Engineering Fair for his materials and bioengineering project. He attends the Saginaw Arts and Sciences Academy, Saginaw, Michigan, U.S.A.Naming citation (20070828/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Williamartin is today
Seen from above the solar system on 2026-10-14: Williamartin is 2.38 au from the Sun and 2.08 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23172 |
| Provisional designation | 2000 HU22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.13 km (#16,873 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.268 |
| Absolute magnitude (H) | 15.72 |
| Orbital period | 3.47 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 2.20 – 2.39 au |
| Eccentricity | 0.0399 |
| Inclination | 0.272° |
| Closest distance between its orbit and Earth's (MOID) | 1.19 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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