(8163) Ishizaki Main-belt Asteroid
Discovered on 27 October 1990 by T. Seki at Geisei.
Named in honor of Masako Ishizaki (b. 1902), long-time Japanese amateur astronomer and pioneer in the study of meteoric dust. In particular, she studied dust collected for her at the Showa Base in Antarctica, where terrestrial contamination is low. Name proposed by the discoverer following a suggestion by S. Morikubo, I. Hasegawa and T. Sato.Naming citation (19981005/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ishizaki is today
Seen from above the solar system on 2026-10-14: Ishizaki is 2.28 au from the Sun and 2.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8163 |
| Provisional designation | 1990 UF2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.96 km (#10,695 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.198 |
| Rotation period | 3.24 hours |
| Absolute magnitude (H) | 14.18 |
| Orbital period | 3.39 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.95 – 2.56 au |
| Eccentricity | 0.135 |
| Inclination | 6.90° |
| Closest distance between its orbit and Earth's (MOID) | 0.956 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.