(7945) Kreisau Main-belt Asteroid
Discovered on 13 September 1991 by Borngen, F., Schmadel, L. D. at Tautenburg.
Named in memory of an anti-Nazi resistance group formed in 1942 in Silesia at the Kreisau farm, the family estate of H. J. Graf von Moltke. The members of the group, called Kreisauer Kreis, were mainly conservative people from a variety of social backgrounds and political attitudes. They considered the possibility of eliminating the fascist regime and revising Germany's ethical and political character. Most of the members were executed following the assassination attempt on the fascist leader in July 1944. Name proposed by the first discoverer.Naming citation (19980411/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Kreisau is today
Seen from above the solar system on 2026-10-14: Kreisau is 2.23 au from the Sun and 1.35 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7945 |
| Provisional designation | 1991 RK7 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.67 km (#13,525 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.290 |
| Rotation period | 5.68 hours |
| Absolute magnitude (H) | 14.29 |
| Orbital period | 3.21 years |
| Semi-major axis | 2.18 au |
| Perihelion – aphelion | 1.91 – 2.44 au |
| Eccentricity | 0.122 |
| Inclination | 4.01° |
| Closest distance between its orbit and Earth's (MOID) | 0.897 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 13 September 1991
- (5338) Michelblanc
- (5628) Preussen
- (6044) Hammer-Purgstall
- (6966) Vietoris
- (7586) Bismarck
- (7767) Tomatic
- (9761) Krautter
- (9762) Hermannhesse
- (9863) Reichardt
- (10096) Colleenohare
- (12729) Berger
- (13531) Weizsacker