(66480) Riese Main-belt Asteroid
Discovered on 10 September 1999 by Starkenburg at Heppenheim.
Jobst-Peter Riese (b. 1942) is a German amateur radio astronomer. He has been a member of the Starkenburg Observatory in Heppenheim since 1975 and served as its managing director from 2004 to 2010. In 1976, Riese founded the observatory’s radio astronomy section. This minor planet was named on the occasion of the section’s 50th anniversary.Naming citation (WGSBN Bull. 6, #12, 8), IAU / Minor Planet Center, via NASA/JPL
Where Riese is today
Seen from above the solar system on 2026-10-14: Riese is 2.40 au from the Sun and 3.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 66480 |
| Provisional designation | 1999 RW33 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.49 km (#9,723 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0770 |
| Absolute magnitude (H) | 15.08 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.21 – 3.08 au |
| Eccentricity | 0.165 |
| Inclination | 11.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.26 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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