(9229) Matsuda Main-belt Asteroid
Discovered on 20 February 1996 by Endate, K., Watanabe, K. at Kitami.
Junichi Matsuda (b. 1948) is a professor at Osaka University who carries out noble-gas research in meteorites and terrestrial materials. His studies have also contributed to better understanding of the origins of diamonds in meteorites, as well as the isolation of noble-gas carriers in same.Naming citation (20030106/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Matsuda is today
Seen from above the solar system on 2026-10-14: Matsuda is 3.05 au from the Sun and 4.00 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9229 |
| Provisional designation | 1996 DJ1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.81 km (#9,204 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.228 |
| Absolute magnitude (H) | 13.59 |
| Orbital period | 4.96 years |
| Semi-major axis | 2.91 au |
| Perihelion – aphelion | 2.70 – 3.11 au |
| Eccentricity | 0.0697 |
| Inclination | 1.06° |
| Closest distance between its orbit and Earth's (MOID) | 1.72 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.