(9854) Karlheinz Main-belt Asteroid
Discovered on 15 January 1991 by F. Borngen at Tautenburg.
Named for Karlheinz Müller (b. 1943), by profession an agricultural clerk. From his youth on, he committed himself to astrophotography and brightness estimates of variable stars. He has directed the Volkssternwarte Drebach since 1969 and oversaw the completion of a Zeiss planetarium and a new main building. He has helped popularize astronomy for people of all ages. Müller created the conditions for observing minor planets in Drebach. This minor planet was numbered with the help of positions observed in Drebach in 1996 and 1998.Naming citation (19990728/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Karlheinz is today
Seen from above the solar system on 2026-10-14: Karlheinz is 2.22 au from the Sun and 2.93 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9854 |
| Provisional designation | 1991 AC3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.21 km (#10,221 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.236 |
| Rotation period | 4.69 hours |
| Absolute magnitude (H) | 13.88 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.22 – 3.07 au |
| Eccentricity | 0.160 |
| Inclination | 4.53° |
| Closest distance between its orbit and Earth's (MOID) | 1.21 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 15 January 1991
- (6320) Bremen
- (6396) Schleswig
- (7873) Boll
- (9336) Altenburg
- (10774) Eisenach
- (10775) Leipzig
- (16522) Tell
- (29197) Gleim
- (30836) Schnittke
- (30837) Steinheil
- (55749) Eulenspiegel