(12310) Londontario Main-belt Asteroid
Discovered on 29 February 1992 by Spacewatch at Kitt Peak.
The Canadian city of London, Ontario, founded in 1854, is located at the fork of the Thames River, midway between Lake Erie and Lake Huron. It is a center of education, health care and commerce. The name was suggested by P. Jedicke and R. Jedicke.Naming citation (20050523/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Londontario is today
Seen from above the solar system on 2026-10-14: Londontario is 2.28 au from the Sun and 1.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12310 |
| Provisional designation | 1992 DE4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.36 km (#6,256 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0530 |
| Absolute magnitude (H) | 14.45 |
| Orbital period | 4.52 years |
| Semi-major axis | 2.73 au |
| Perihelion – aphelion | 2.23 – 3.24 au |
| Eccentricity | 0.186 |
| Inclination | 1.70° |
| 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 discovered on 29 February 1992
- (6654) Lulea
- (9055) Edvardsson
- (9358) Faro
- (10102) Digerhuvud
- (10103) Jungfrun
- (10544) Horsnebara
- (10794) Vange
- (15753) Rathsman
- (17496) Augustinus
- (20025) Petronaviera
- (29227) Wegener