(12580) Antonini Main-belt Asteroid
Discovered on 8 September 1999 by at St. Michel sur Meu 41032 Bernasconi, L..
Pierre Antonini is a retired mathematics professor who has discovered many minor planets and a supernova at his private observatory, using first a 16-cm telescope, now a 30-cm telescope.Naming citation (20000726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Antonini is today
Seen from above the solar system on 2026-10-14: Antonini is 2.39 au from the Sun and 1.40 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12580 |
| Provisional designation | 1999 RM33 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.92 km (#6,674 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0650 |
| Rotation period | 8.72 hours |
| Absolute magnitude (H) | 14.31 |
| Orbital period | 5.37 years |
| Semi-major axis | 3.07 au |
| Perihelion – aphelion | 2.32 – 3.81 au |
| Eccentricity | 0.244 |
| Inclination | 2.55° |
| Closest distance between its orbit and Earth's (MOID) | 1.31 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Pierre
- (2190) Coubertin
- (5439) Couturier
- (5442) Drossart
- (5523) Luminet
- (8190) Bouguer
- (10139) Ronsard
- (11401) Pierralba
- (11946) Bayle
- (12007) Fermat
- (12042) Laques
- (12324) Van Rompaey
- (13602) Pierreboulez
All asteroids named after someone called Pierre
Also discovered on 8 September 1999
- (12581) Rovinj
- (13817) Genobechetti
- (16066) Richardbressler
- (16070) Charops
- (19629) Serra
- (19694) Dunkelman
- (19695) Billnye
- (20544) Kimhansell
- (20545) Karenhowell
- (20546) Michaelfruhauf
- (20547) Michimani
- (20548) Milewski
← (12579) Ceva · (12581) Rovinj →