(20597) Pickersgill Main-belt Asteroid
Discovered on 11 September 1999 by LINEAR at Socorro.
Annemarie Pickersgill (b. 1987) is a Canadian planetary scientist at the Scottish Universities Environmental Research Centre, investigating the effects of hypervelocity impact cratering processes. They provided a revised age for the Chicxulub “dinosaur killing” impact crater showing hydrothermal systems were much longer lived than previously thought.Naming citation (WGSBN Bull. 6, #11, 29), IAU / Minor Planet Center, via NASA/JPL
Where Pickersgill is today
Seen from above the solar system on 2026-10-14: Pickersgill is 2.69 au from the Sun and 3.49 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20597 |
| Provisional designation | 1999 RA192 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.66 km (#11,325 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.187 |
| Absolute magnitude (H) | 14.03 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.20 – 2.99 au |
| Eccentricity | 0.151 |
| Inclination | 12.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.22 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Annemarie
All asteroids named after someone called Annemarie
Also discovered on 11 September 1999
- (12583) Buckjean
- (13396) Midavaine
- (16065) Borel
- (20517) Judycrystal
- (20613) Chibaken
- (21685) Francomallia
- (21686) Koschny
- (21687) Filopanti
- (36061) Haldane
- (36169) Grosseteste
- (38270) Wettzell
- (40440) Dobrovsky