(31431) Cabibbo Main-belt Asteroid
Discovered on 21 January 1999 by Osservatorio San Vittore at Bologna.
Nicola Cabibbo (1935-2010) was an Italian physicist known for his work on the weak interaction and the so-called Cabibbo angle.Naming citation (20110218/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Cabibbo is today
Seen from above the solar system on 2026-10-14: Cabibbo is 3.10 au from the Sun and 3.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31431 |
| Provisional designation | 1999 BP9 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.73 km (#9,329 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.178 |
| Rotation period | 7.61 hours |
| Absolute magnitude (H) | 14.47 |
| Orbital period | 4.60 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 2.04 – 3.49 au |
| Eccentricity | 0.262 |
| Inclination | 9.90° |
| Closest distance between its orbit and Earth's (MOID) | 1.05 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Nicola
All asteroids named after someone called Nicola
Also discovered on 21 January 1999
- (27178) Quino
- (29736) Fichtelberg
- (29737) Norihiro
- (31429) Diegoazzaro
- (35683) Broumov
- (53141) Marcmoniez
- (79900) Coreglia
- (152750) Brloh