(12287) Langres Main-belt Asteroid
Discovered on 8 April 1991 by E. W. Elst at La Silla.
Langres is a French city in the south of the Haute-Marne department. In 1713 the great philosopher Denis Diderot was born there and a copy of his master work, together with d´Alembert, l´Encyclopédie, is present in the local library.Naming citation (20031110/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Langres is today
Seen from above the solar system on 2026-10-14: Langres is 2.75 au from the Sun and 2.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12287 |
| Provisional designation | 1991 GH5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.03 km (#6,554 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0830 |
| Rotation period | 7.32 hours |
| Absolute magnitude (H) | 14.12 |
| Orbital period | 5.69 years |
| Semi-major axis | 3.19 au |
| Perihelion – aphelion | 2.75 – 3.63 au |
| Eccentricity | 0.138 |
| Inclination | 4.40° |
| Closest distance between its orbit and Earth's (MOID) | 1.74 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 8 April 1991
- (6487) Tonyspear
- (6647) Josse
- (6912) Grimm
- (7126) Cureau
- (7179) Gassendi
- (8277) Machu-Picchu
- (8369) Miyata
- (8665) Daun-Eifel
- (8852) Buxus
- (9180) Samsagan
- (9339) Kimnovak
- (9592) Clairaut