(45639) Tomney Main-belt Asteroid
Discovered on 3 March 2000 by CSS at Catalina.
Jim Tomney (b. 1955) is an American amateur astronomer who has made significant contributions to the Association of Lunar and Planetary Observers modernizing its digital presence, curating the extensive image galleries, and preserving over 36000 observations from the observers. He led the redesign and launch of the ALPO website in 2023.Naming citation (WGSBN Bull. 6, #9, 15), IAU / Minor Planet Center, via NASA/JPL
Where Tomney is today
Seen from above the solar system on 2026-10-14: Tomney is 3.13 au from the Sun and 2.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 45639 |
| Provisional designation | 2000 EP20 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.2 km (#3,349 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0340 |
| Absolute magnitude (H) | 13.63 |
| Orbital period | 5.57 years |
| Semi-major axis | 3.14 au |
| Perihelion – aphelion | 2.88 – 3.40 au |
| Eccentricity | 0.0819 |
| Inclination | 24.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.91 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Jim
Also discovered on 3 March 2000
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