(10967) Billallen Main-belt Asteroid
Discovered on 26 March 1971 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
William H. Allen (b. 1939), an electrical engineer and amateur astronomer, erected his private observatory with a 0.32-m telescope in Rapaura, New Zealand. He has participated in photometric campaigns on cataclysmic variables, notably η Carinae, as well as on stellar occultations by minor planets.Naming citation (20060219/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Billallen is today
Seen from above the solar system on 2026-10-14: Billallen is 3.46 au from the Sun and 4.45 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10967 |
| Provisional designation | 4349 T-1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.78 km (#6,793 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0440 |
| Absolute magnitude (H) | 13.88 |
| Orbital period | 4.61 years |
| Semi-major axis | 2.77 au |
| Perihelion – aphelion | 1.91 – 3.63 au |
| Eccentricity | 0.309 |
| Inclination | 8.98° |
| Closest distance between its orbit and Earth's (MOID) | 0.907 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called William
- (1853) McElroy
- (2220) Hicks
- (3445) Pinson
- (3894) Williamcooke
- (4137) Crabtree
- (4423) Golden
- (4838) Billmclaughlin
- (5345) Boynton
- (5763) Williamtobin
- (6012) Williammurdoch
- (6613) Williamcarl
- (6756) Williamfeldman
All asteroids named after someone called William
Also discovered on 26 March 1971
- (5195) Kaendler
- (5491) Kaulbach
- (5492) Thoma
- (5698) Nolde
- (6202) Georgemiley
- (6257) Thorvaldsen
- (6351) Neumann
- (6429) Brancusi
- (6674) Cezanne
- (6752) Ashley
- (7367) Giotto
- (7908) Zwingli