(21752) Johnthurmon Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
John Thomas Thurmon (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for his engineering team project. He attends the Chillicothe High School, Chillicothe, Missouri, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Johnthurmon is today
Seen from above the solar system on 2026-10-14: Johnthurmon is 2.15 au from the Sun and 2.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21752 |
| Provisional designation | 1999 RC179 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.02 km (#15,167 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.337 |
| Absolute magnitude (H) | 14.67 |
| Orbital period | 3.69 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.10 – 2.68 au |
| Eccentricity | 0.123 |
| Inclination | 5.16° |
| Closest distance between its orbit and Earth's (MOID) | 1.12 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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