(6018) Pierssac Main-belt Asteroid
Discovered on 7 August 1991 by H. E. Holt at Palomar.
Piers John Sellers (b. 1955), nicknamed Pierssac by his brothers, is a British-American Earth scientist, astronaut and Deputy Director of GSFC's Science and Exploration Directorate. He has researched the role of the land surface in the climate system, and advocated for mitigation of human-caused climate change.Naming citation (MPC batch dated 2016-06-20), IAU / Minor Planet Center, via NASA/JPL
Where Pierssac is today
Seen from above the solar system on 2026-10-14: Pierssac is 2.56 au from the Sun and 1.93 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6018 |
| Provisional designation | 1991 PS16 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.63 km (#9,529 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.322 |
| Rotation period | 68.9 hours |
| Absolute magnitude (H) | 13.44 |
| Orbital period | 3.42 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.98 – 2.56 au |
| Eccentricity | 0.128 |
| Inclination | 6.15° |
| Closest distance between its orbit and Earth's (MOID) | 0.981 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 7 August 1991
- (5034) Joeharrington
- (5445) Williwaw
- (5596) Morbidelli
- (6014) Chribrenmark
- (6015) Paularego
- (6016) Carnelli
- (6017) Robertmorehead
- (8027) Robertrushworth
- (8280) Petergruber