(45027) Cosquer Main-belt Asteroid
Discovered on 28 November 1999 by S. Sposetti at Gnosca.
Henri Cosquer (b. 1950) is a professional diver who in 1985 discovered the cave now named for him near Marseilles. On the walls of the cave are ancient paintings dating back 27~000 and 19~000 years. The cave entrance is 37 meters under the actual Mediterranean sea level. The name was suggested by G. Burki.Naming citation (20100726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Cosquer is today
Seen from above the solar system on 2026-10-14: Cosquer is 2.59 au from the Sun and 1.70 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 45027 |
| Provisional designation | 1999 WA9 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.77 km (#11,072 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0370 |
| Absolute magnitude (H) | 15.57 |
| Orbital period | 4.53 years |
| Semi-major axis | 2.74 au |
| Perihelion – aphelion | 2.57 – 2.90 au |
| Eccentricity | 0.0597 |
| Inclination | 5.13° |
| Closest distance between its orbit and Earth's (MOID) | 1.58 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Henri
- (2359) Debehogne
- (3820) Sauval
- (7763) Crabeels
- (8240) Matisse
- (8521) Boulainvilliers
- (10311) Fantin-Latour
- (11506) Toulouse-Lautrec
- (11763) Deslandres
- (12261) Ledouanier
- (12702) Panamarenko
- (12708) Van Straten
- (20358) Dalem
All asteroids named after someone called Henri
Also discovered on 28 November 1999
- (13437) Wellton-Persson
- (16110) Paganetti
- (17190) Retopezzoli
- (43087) Castegna
- (47294) Blansky les
- (56329) Tarxien
- (66939) Franscini
- (70936) Kamen
- (70942) Vandanashiva
- (75223) Wupatki
- (97186) Tore