(20722) Aaronclevenson Main-belt Asteroid
Discovered on 4 December 1999 by CSS at Catalina.
Aaron Clevenson (b. 1955) is a retired astronomy professor at Lone Star College-Montgomery in Texas and the Observatory Director for the Insperity Observatory in the Humble Independent School District. He is the recipient of the Astronomical League (AL) Award for lifetime contributions to AL Observing Programs as a National Observing Program Director.Naming citation (WGSBN Bull. 3, #2, 12), IAU / Minor Planet Center, via NASA/JPL
Where Aaronclevenson is today
Seen from above the solar system on 2026-10-14: Aaronclevenson is 3.25 au from the Sun and 2.84 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20722 |
| Provisional designation | 1999 XZ109 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 12.93 |
| Orbital period | 5.30 years |
| Semi-major axis | 3.04 au |
| Perihelion – aphelion | 2.81 – 3.27 au |
| Eccentricity | 0.0747 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.80 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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