(21686) Koschny Main-belt Asteroid
Discovered on 11 September 1999 by A. Knofel at Drebach.
Aerospace engineer Detlef Koschny (b. 1962) is a member of the Rosetta Project Scientists' Team of the European Space Research and Technology Center of the European Space Agency. He is also an active amateur astronomer and works on the subject of ground-based observations of meteors with intensified video cameras.Naming citation (WGSBN Bull. 4, #9, 5), IAU / Minor Planet Center, via NASA/JPL
Where Koschny is today
Seen from above the solar system on 2026-10-14: Koschny is 2.17 au from the Sun and 2.27 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21686 |
| Provisional designation | 1999 RB36 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.11 |
| Orbital period | 3.45 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 2.03 – 2.53 au |
| Eccentricity | 0.109 |
| Inclination | 1.72° |
| Closest distance between its orbit and Earth's (MOID) | 1.02 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 11 September 1999
- (12583) Buckjean
- (13396) Midavaine
- (16065) Borel
- (20517) Judycrystal
- (20597) Pickersgill
- (20613) Chibaken
- (21685) Francomallia
- (21687) Filopanti
- (36061) Haldane
- (36169) Grosseteste
- (38270) Wettzell
- (40440) Dobrovsky