(13490) Allanchapman Main-belt Asteroid
Discovered on 26 January 1984 by E. Bowell at Palomar.
Allan Chapman (1946–2026) was an eminent British historian, and a world-renowned authority on the history of science. He was a prolific author and astronomy popularizer, and a popular speaker to UK amateur-astronomy societies and conventions. He was Honorary President of the Society for the History of Astronomy and of several astronomical societies.Naming citation (WGSBN Bull. 6, #3, 6), IAU / Minor Planet Center, via NASA/JPL
Where Allanchapman is today
Seen from above the solar system on 2026-10-14: Allanchapman is 2.56 au from the Sun and 2.38 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13490 |
| Provisional designation | 1984 BZ6 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.76 |
| Orbital period | 5.41 years |
| Semi-major axis | 3.08 au |
| Perihelion – aphelion | 2.40 – 3.77 au |
| Eccentricity | 0.222 |
| Inclination | 1.51° |
| Closest distance between its orbit and Earth's (MOID) | 1.40 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Allan
- (9963) Sandage
- (11414) Allanchu
- (11697) Estrella
- (27604) Affeldt
- (70715) Allancheuvront
- (171153) Allanrahill
- (175259) Offenberger
All asteroids named after someone called Allan