(157491) Rudigerkollar Main-belt Asteroid
Discovered on 8 September 2005 by M. Fiedler at Radebeul.
Rüdiger Kollar (1925-2005) founded the Radebeul Public Observatory, where this minor planet was discovered. Later he became director of this Observatory and remained in that position until his retirement in 1989.Naming citation (20080122/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Rudigerkollar is today
Seen from above the solar system on 2026-10-14: Rudigerkollar is 2.56 au from the Sun and 1.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 157491 |
| Provisional designation | 2005 RD22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.62 km (#16,011 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.135 |
| Absolute magnitude (H) | 15.87 |
| Orbital period | 5.36 years |
| Semi-major axis | 3.06 au |
| Perihelion – aphelion | 2.48 – 3.65 au |
| Eccentricity | 0.191 |
| Inclination | 3.31° |
| Closest distance between its orbit and Earth's (MOID) | 1.48 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.