(4991) Hansuess Main-belt Asteroid
Discovered on 1 March 1981 by S. J. Bus at Siding Spring.
Hans Suess (1909-1993) was one of the pioneers of cosmochemistry. He proposed that the relative abundance of each element depends on its mass and that patterns in elemental abundances were caused by a combination of nuclear properties and the mechanisms by which heavy elements are created in stars.Naming citation (20001013/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hansuess is today
Seen from above the solar system on 2026-10-14: Hansuess is 3.17 au from the Sun and 3.46 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4991 |
| Provisional designation | 1981 EU29 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 12.89 |
| Orbital period | 5.20 years |
| Semi-major axis | 3.00 au |
| Perihelion – aphelion | 2.69 – 3.31 au |
| Eccentricity | 0.102 |
| Inclination | 10.5° |
| Closest distance between its orbit and Earth's (MOID) | 1.69 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hans
- (3692) Rickman
- (5323) Fogh
- (5475) Hanskennedy
- (6847) Kunz-Hallstein
- (8122) Holbein
- (9562) Memling
- (9689) Freudenthal
- (10542) Ruckers
- (12672) Nygardh
- (12729) Berger
- (13177) Hansschmidt
- (14025) Fallada
All asteroids named after someone called Hans
Also discovered on 1 March 1981
- (2788) Andenne
- (3016) Meuse
- (3029) Sanders
- (3030) Vehrenberg
- (3042) Zelinsky
- (3058) Delmary
- (3075) Bornmann
- (3135) Lauer
- (3308) Ferreri
- (3472) Upgren
- (3498) Belton
- (3503) Brandt
More named asteroids discovered by S. J. Bus
- (2285) Ron Helin
- (2780) Monnig
- (2791) Paradise
- (2884) Reddish
- (2919) Dali
- (2980) Cameron
- (2981) Chagall
- (2990) Trimberger
- (3000) Leonardo
- (3029) Sanders
- (3030) Vehrenberg
- (3042) Zelinsky
← (4990) Trombka · (4992) Kalman →