(9111) Matarazzo Main-belt Asteroid
Discovered on 28 January 1997 by Sicoli, P., Manca, F. at Sormano.
The Sicilian amateur astronomer Giuseppe “Corrado” Matarazzo (b. 1946) is an experienced mathematician whose interests include orbital computations. In 1995 he co-authored Elementi di Calcolo delle Orbite.Naming citation (19991123/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Matarazzo is today
Seen from above the solar system on 2026-10-14: Matarazzo is 2.24 au from the Sun and 2.18 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9111 |
| Provisional designation | 1997 BD2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.93 km (#9,044 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.240 |
| Rotation period | 60.0 hours |
| Absolute magnitude (H) | 13.77 |
| Orbital period | 3.47 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 1.97 – 2.61 au |
| Eccentricity | 0.141 |
| Inclination | 10.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.00 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.