(9645) Grunewald Main-belt Asteroid
Discovered on 5 January 1995 by F. Borngen at Tautenburg.
Named for the German painter and watercolor artist Matthias Grünewald (c. 1460-1528). His original name was Mathis Gothart Neithardt (or Niethart). His masterpiece is the Isenheimer altar in Colmar, one of the great works of Western art, featuring spiritual and realistic scenes juxtaposed and notable for the variety and beauty of the colors. Paul Hindemith made Grünewald's life the subject of his opera and symphony Mathis der Maler.Naming citation (19990402/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Grunewald is today
Seen from above the solar system on 2026-10-14: Grunewald is 2.68 au from the Sun and 2.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9645 |
| Provisional designation | 1995 AO4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.2 km (#5,006 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0820 |
| Absolute magnitude (H) | 13.66 |
| Orbital period | 4.57 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 2.48 – 3.03 au |
| Eccentricity | 0.101 |
| Inclination | 3.34° |
| Closest distance between its orbit and Earth's (MOID) | 1.47 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.