(8140) Hardersen Main-belt Asteroid
Discovered on 1 March 1981 by S. J. Bus at Siding Spring.
Paul S. Hardersen (b. 1965) is a professor and observatory director in the Department of Space Studies at the University of North Dakota. His research includes mineralogical analysis of minor-planet surfaces using telescopic measurements in the near-infrared.Naming citation (20120506/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hardersen is today
Seen from above the solar system on 2026-10-14: Hardersen is 2.91 au from the Sun and 3.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8140 |
| Provisional designation | 1981 EO15 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.15 km (#6,434 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0800 |
| Rotation period | 18.4 hours |
| Absolute magnitude (H) | 13.48 |
| Orbital period | 4.52 years |
| Semi-major axis | 2.73 au |
| Perihelion – aphelion | 2.54 – 2.93 au |
| Eccentricity | 0.0714 |
| Inclination | 6.80° |
| Closest distance between its orbit and Earth's (MOID) | 1.55 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Paul
- (3743) Pauljaniczek
- (4148) McCartney
- (4194) Sweitzer
- (5065) Johnstone
- (5553) Chodas
- (5997) Dirac
- (6226) Paulwarren
- (6384) Kervin
- (6629) Kurtz
- (6726) Suthers
- (6870) Pauldavies
- (7560) Spudis
All asteroids named after someone called Paul
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