(19911) Rigaux Main-belt Asteroid
Discovered on 26 March 1933 by F. Rigaux at Uccle.
Fernand Rigaux (1905-1962) was a Belgian astronomer at the Royal Observatory, Uccle, who discovered several asteroids (including the one that now bears his name). He was also a co-discoverer of comet 49P/Arend-Rigaux. Name suggested by W.A. Fröger.Naming citation (MPC batch dated 2015-12-25), IAU / Minor Planet Center, via NASA/JPL
Where Rigaux is today
Seen from above the solar system on 2026-10-14: Rigaux is 3.84 au from the Sun and 2.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 19911 |
| Provisional designation | 1933 FK |
| Orbit class | Main-belt Asteroid |
| Diameter | 18.3 km (#2,444 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0760 |
| Rotation period | 2.33 hours |
| Absolute magnitude (H) | 12.47 |
| Orbital period | 5.31 years |
| Semi-major axis | 3.04 au |
| Perihelion – aphelion | 2.15 – 3.94 au |
| Eccentricity | 0.295 |
| Inclination | 14.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Fernand
All asteroids named after someone called Fernand