(20565) Oliviermousis Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Olivier Mousis (b. 1973) is a French astrophysicist who was a professor at Aix–Marseille Université before becoming a program director at the Southwest Research Institute. His research focuses on the origin and evolution of volatile-rich small bodies and giant planet systems. Olivier also plays a key role in developing outer Solar System mission concepts.Naming citation (WGSBN Bull. 6, #11, 28), IAU / Minor Planet Center, via NASA/JPL
Where Oliviermousis is today
Seen from above the solar system on 2026-10-14: Oliviermousis is 3.16 au from the Sun and 3.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20565 |
| Provisional designation | 1999 RR123 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.83 km (#6,751 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.288 |
| Rotation period | 9.03 hours |
| Absolute magnitude (H) | 12.85 |
| Orbital period | 5.64 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.97 – 3.37 au |
| Eccentricity | 0.0630 |
| Inclination | 10.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.98 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Olivier
- (6065) Chesneau
- (8799) Barnouin
- (14617) Lasvergnas
- (14972) Olihainaut
- (16280) Groussin
- (20764) Witasse
- (34708) Grasset
- (54863) Gasnault
- (59162) Olivierbienayme
- (378721) Thizy
All asteroids named after someone called Olivier
Also discovered on 9 September 1999
- (12127) Mamiya
- (12130) Mousa
- (12589) Davidanand
- (12590) Ballantine
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra