(10633) Akimasa Main-belt Asteroid
Discovered on 20 February 1998 by P. Pravec at Ondrejov.
Named in honor of Akimasa Nakamura (b. 1961), a prolific Japanese observer of minor planets and comets. In the course of his observing program at the Kuma Kogen Astronomical Observatory he has obtained thousands of precise positions of minor bodies. His estimates of the magnitudes of minor planets are of particularly high quality and serve as the standard in the analysis of “astrometric” magnitude estimates. He is also Japanese coordinator for the International Comet Quarterly. This name marks the occasion of Nakamura's becoming a father in early 1999.Naming citation (19990728/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Akimasa is today
Seen from above the solar system on 2026-10-14: Akimasa is 2.68 au from the Sun and 3.02 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10633 |
| Provisional designation | 1998 DP1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.41 km (#14,209 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.419 |
| Absolute magnitude (H) | 14.34 |
| Orbital period | 3.85 years |
| Semi-major axis | 2.46 au |
| Perihelion – aphelion | 2.23 – 2.68 au |
| Eccentricity | 0.0927 |
| Inclination | 7.25° |
| Closest distance between its orbit and Earth's (MOID) | 1.25 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.