(17855) Geffert Main-belt Asteroid
Discovered on 19 May 1998 by Starkenburg at Heppenheim.
The German amateur astronomer Martin Geffert (b. 1922) has been very dedicated to the Starkenburg Observatory, being one of the founders and treasurer of the observatory since its beginnings in 1970. He is also an excellent performer on the mandolin.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Geffert is today
Seen from above the solar system on 2026-10-14: Geffert is 3.52 au from the Sun and 3.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 17855 |
| Provisional designation | 1998 KK |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.8 km (#3,202 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0620 |
| Rotation period | 7.47 hours |
| Absolute magnitude (H) | 13.07 |
| Orbital period | 5.48 years |
| Semi-major axis | 3.11 au |
| Perihelion – aphelion | 2.69 – 3.53 au |
| Eccentricity | 0.135 |
| Inclination | 5.20° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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