(12229) Paulsson Main-belt Asteroid
Discovered on 17 October 1985 by C.-I. Lagerkvist at Kvistaberg.
Rolf Paulsson (b. 1943), a lecturer at Uppsala University, has been an outstanding teacher of theoretical physics for generations of students.Naming citation (20091004/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Paulsson is today
Seen from above the solar system on 2026-10-14: Paulsson is 2.43 au from the Sun and 1.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12229 |
| Provisional designation | 1985 UK3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.22 km (#12,207 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.395 |
| Absolute magnitude (H) | 13.86 |
| Orbital period | 3.38 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.90 – 2.60 au |
| Eccentricity | 0.156 |
| Inclination | 4.60° |
| Closest distance between its orbit and Earth's (MOID) | 0.890 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Rolf
All asteroids named after someone called Rolf