(20230) Blanchard Main-belt Asteroid
Discovered on 6 December 1997 by ODAS at Caussols.
Guillaume Blanchard (b. 1969) is a French optician who specializes in astronomical optics. An amateur astronomer for more than 20 years, he has built many telescopes and is now working in the field of optical correctors. He has written several papers on the history of optics.Naming citation (20030806/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Blanchard is today
Seen from above the solar system on 2026-10-14: Blanchard is 2.30 au from the Sun and 3.26 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20230 |
| Provisional designation | 1997 XH5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.25 km (#16,692 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.220 |
| Absolute magnitude (H) | 15.86 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.12 – 2.50 au |
| Eccentricity | 0.0811 |
| Inclination | 3.56° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Guillaume
All asteroids named after someone called Guillaume