(21640) Petekirkland Main-belt Asteroid
Discovered on 14 July 1999 by LINEAR at Socorro.
Peter Jonathan Kirkland (b. 1986) was awarded first place in the 2005 Intel International Science and Engineering Fair for his engineering project. He attends the Dalriada School, Ballymoney, County Antrim, Northern Ireland.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Petekirkland is today
Seen from above the solar system on 2026-10-14: Petekirkland is 2.46 au from the Sun and 2.78 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21640 |
| Provisional designation | 1999 NX39 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.59 km (#16,093 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.382 |
| Absolute magnitude (H) | 14.83 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.87 – 2.69 au |
| Eccentricity | 0.180 |
| Inclination | 5.81° |
| Closest distance between its orbit and Earth's (MOID) | 0.883 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Peter
- (2382) Nonie
- (4314) Dervan
- (4507) Petercollins
- (5153) Gierasch
- (7527) Marples
- (7925) Shelus
- (8086) Peterthomas
- (8160) Petererwin
- (8280) Petergruber
- (8395) Rembaut
- (9207) Petersmith
- (9269) Peterolufemi
All asteroids named after someone called Peter
Also discovered on 14 July 1999
- (11751) Davidcarroll
- (12120) Rebeccagrella
- (15502) Hypeirochus
- (16062) Buncher
- (17169) Tatarinov
- (17170) Vsevustinov
- (18823) Zachozer
- (18824) Graves
- (18825) Alicechai
- (18826) Leifer
- (18830) Pothier
- (19589) Kirkland