(12125) Jamesjones Main-belt Asteroid
Discovered on 3 September 1999 by Spacewatch at Kitt Peak.
James Jones (b. 1939) studied at Sheffield University in Yorkshire and has been professor of physics at the University of Western Ontario since 1966. Jones pioneered the video observation of meteors and single-station radar radiant mapping.Naming citation (20020328/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Jamesjones is today
Seen from above the solar system on 2026-10-14: Jamesjones is 2.52 au from the Sun and 2.09 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12125 |
| Provisional designation | 1999 RS4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.4 km (#4,339 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0490 |
| Rotation period | 0.920 hours |
| Absolute magnitude (H) | 13.71 |
| Orbital period | 5.46 years |
| Semi-major axis | 3.10 au |
| Perihelion – aphelion | 2.49 – 3.71 au |
| Eccentricity | 0.195 |
| Inclination | 0.215° |
| Closest distance between its orbit and Earth's (MOID) | 1.48 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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