(10340) Jostjahn Main-belt Asteroid
Discovered on 10 September 1991 by F. Borngen at Tautenburg.
Jost Jahn (b. 1959), a dental surgeon, has been editor of the German Astro-Fax-Circulars for amateurs and on the board of the Vereinigung der Sternfreunde since 1992. During 1995-1997, he was head of the minor planets section of this association.Naming citation (20000320/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Jostjahn is today
Seen from above the solar system on 2026-10-14: Jostjahn is 2.95 au from the Sun and 2.35 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10340 |
| Provisional designation | 1991 RT40 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.97 km (#7,694 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.229 |
| Rotation period | 26.3 hours |
| Absolute magnitude (H) | 13.29 |
| Orbital period | 4.88 years |
| Semi-major axis | 2.88 au |
| Perihelion – aphelion | 2.76 – 2.99 au |
| Eccentricity | 0.0394 |
| Inclination | 2.35° |
| Closest distance between its orbit and Earth's (MOID) | 1.75 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 10 September 1991
- (6651) Rogervenable
- (8282) Delp
- (9189) Holderlin
- (11061) Lagerlof
- (17486) Hodler
- (27764) von Flue
- (27765) Brockhaus
- (29212) Zeeman
- (43804) Peterting
- (65694) Franzrosenzweig
More named asteroids discovered by F. Borngen
- (3181) Ahnert
- (3245) Jensch
- (3338) Richter
- (3539) Weimar
- (3540) Protesilaos
- (3802) Dornburg
- (3808) Tempel
- (3826) Handel
- (3917) Franz Schubert
- (3941) Haydn
- (3943) Silbermann
- (3954) Mendelssohn
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