(12625) Koopman Main-belt Asteroid
Discovered on 17 October 1960 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Elizabetha Koopman (1647-1693), daughter of a Dutch merchant, was the second wife of Polish astronomer Johannes Hevelius. She assisted her husband with his astronomical observations, and after his death in 1687 she prepared his star atlas and catalogue for publication. The name was suggested by R. H. van Gent.Naming citation (20090409/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Koopman is today
Seen from above the solar system on 2026-10-14: Koopman is 3.02 au from the Sun and 2.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12625 |
| Provisional designation | 9578 P-L |
| Orbit class | Main-belt Asteroid |
| Diameter | 13.8 km (#3,459 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0970 |
| Rotation period | 13.0 hours |
| Absolute magnitude (H) | 13.09 |
| Orbital period | 5.50 years |
| Semi-major axis | 3.12 au |
| Perihelion – aphelion | 2.80 – 3.43 au |
| Eccentricity | 0.102 |
| Inclination | 5.89° |
| Closest distance between its orbit and Earth's (MOID) | 1.82 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 17 October 1960
- (1813) Imhotep
- (2082) Galahad
- (2319) Aristides
- (2412) Wil
- (2495) Noviomagum
- (3279) Solon
- (3604) Berkhuijsen
- (3734) Waland
- (4355) Memphis
- (4356) Marathon
- (4907) Zoser
- (5012) Eurymedon