(9399) Pesch Main-belt Asteroid
Discovered on 29 September 1994 by Spacewatch at Kitt Peak.
Peter Pesch (b. 1934), director of the Warner and Swasey Observatory during 1975--1994 and professor of astronomy at Case Western Reserve University during 1961--1997, is a leader in the search for unresolved blue objects (galaxies, QSOs and stars) through the use of low-dispersion prisms on the Burrell Schmidt Telescope.Naming citation (20000523/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Pesch is today
Seen from above the solar system on 2026-10-14: Pesch is 2.57 au from the Sun and 3.53 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9399 |
| Provisional designation | 1994 ST12 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.36 km (#11,922 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.256 |
| Absolute magnitude (H) | 13.8 |
| Orbital period | 4.17 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.18 – 3.00 au |
| Eccentricity | 0.158 |
| Inclination | 3.75° |
| Closest distance between its orbit and Earth's (MOID) | 1.17 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Peter
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