(9553) Colas Main-belt Asteroid
Discovered on 17 October 1985 by CERGA at Caussols.
François Colas (b. 1959) is an expert on modern solar-system astrometry at the Institut de Mécanique Celeste in Paris. He has contributed to numerous research papers in observational planetary astronomy. A strong supporter of the Pic du Midi Observatory, he has many fruitful relations with the amateur community.Naming citation (19991123/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Colas is today
Seen from above the solar system on 2026-10-14: Colas is 2.45 au from the Sun and 3.32 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9553 |
| Provisional designation | 1985 UG2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.79 km (#13,232 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.178 |
| Absolute magnitude (H) | 14.46 |
| Orbital period | 3.26 years |
| Semi-major axis | 2.20 au |
| Perihelion – aphelion | 1.94 – 2.46 au |
| Eccentricity | 0.117 |
| Inclination | 1.92° |
| Closest distance between its orbit and Earth's (MOID) | 0.949 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Francois
- (7865) Francoisgros
- (9349) Lucas
- (9588) Quesnay
- (10140) Villon
- (12898) Mignard
- (13180) Fourcroy
- (13560) La Perouse
- (14189) Sevre
- (19250) Poullain
- (24103) Dethury
- (31043) Sturm
- (31823) Viete
All asteroids named after someone called Francois
Also discovered on 17 October 1985
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