(5623) Iwamori Main-belt Asteroid
Discovered on 20 October 1990 by A. Sugie at Dynic.
Named in memory of Yasuke Iwamori, late principal of Kyoto city Rakuyou technical high school who taught physics and astronomy there. Name proposed by the discoverer following a suggestion by S. Sakabe.Naming citation (19960828/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Iwamori is today
Seen from above the solar system on 2026-10-14: Iwamori is 2.72 au from the Sun and 1.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5623 |
| Provisional designation | 1990 UY |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.3 km (#3,308 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.164 |
| Rotation period | 7.09 hours |
| Absolute magnitude (H) | 12.05 |
| Orbital period | 5.23 years |
| Semi-major axis | 3.01 au |
| Perihelion – aphelion | 2.71 – 3.32 au |
| Eccentricity | 0.101 |
| Inclination | 11.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.70 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.