(6157) Prey Main-belt Asteroid
Discovered on 9 September 1991 by Schmadel, L. D., Borngen, F. at Tautenburg.
Named in memory of Adalbert Prey (1873-1949), professor of astronomy in Innsbruck, Prague and, eventually, Vienna, where he was elected to membership in the Austrian Academy of Sciences. After World War II until his death he served as one of the two secretaries of the Academy. He worked on the motion of 70 Oph (sometimes called “Prey's star”), as well as on the dynamics of minor planets and the moon. He thoroughly investigated the field of isostasy and gravitation, to which he devoted a series of papers. Named by the first discoverer following a suggestion by H. Haupt, who also prepared the citation.Naming citation (19980211/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Prey is today
Seen from above the solar system on 2026-10-14: Prey is 2.26 au from the Sun and 2.41 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6157 |
| Provisional designation | 1991 RX2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.54 km (#13,853 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.512 |
| Absolute magnitude (H) | 14.04 |
| Orbital period | 3.78 years |
| Semi-major axis | 2.42 au |
| Perihelion – aphelion | 2.22 – 2.63 au |
| Eccentricity | 0.0855 |
| Inclination | 3.96° |
| Closest distance between its orbit and Earth's (MOID) | 1.23 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Adalbert
All asteroids named after someone called Adalbert
Also discovered on 9 September 1991
- (5689) Rhon
- (6043) Aurochs
- (7127) Stifter
- (9861) Jahreiss
- (10095) Carlloewe
- (13530) Ninnemann
- (14412) Wolflojewski
- (16544) Hochlehnert
- (19178) Walterbothe
- (29208) Halorentz
- (32821) Posch
- (42487) Angstrom