(20751) Tomnordheim Main-belt Asteroid
Discovered on 9 January 2000 by LINEAR at Socorro.
Tom Nordheim (b. 1986) is a Norwegian planetary scientist based at Johns Hopkins Applied Physics Laboratory, USA. Research he carried out for his Ph.D. at University College London’s Mullard Space Science Laboratory included the charging of comet nucleus surfaces and electrostatic dust levitation.Naming citation (WGSBN Bull. 6, #11, 36), IAU / Minor Planet Center, via NASA/JPL
Where Tomnordheim is today
Seen from above the solar system on 2026-10-14: Tomnordheim is 3.53 au from the Sun and 4.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20751 |
| Provisional designation | 2000 AA200 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.6 km (#3,232 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0330 |
| Absolute magnitude (H) | 13.17 |
| Orbital period | 4.88 years |
| Semi-major axis | 2.88 au |
| Perihelion – aphelion | 2.19 – 3.56 au |
| Eccentricity | 0.238 |
| Inclination | 17.0° |
| 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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