(23465) Yamashitakouhei Main-belt Asteroid
Discovered on 24 October 1989 by Yanai, M., Watanabe, K. at Kitami.
Kouhei Yamashita (b. 1953) was the project manager of the small satellite STARS-II at Kagawa University and contributed to its successful launch. He also photographs nebulae and star clusters with his astrograph.Naming citation (WGSBN Bull. 1, #10, 6), IAU / Minor Planet Center, via NASA/JPL
Where Yamashitakouhei is today
Seen from above the solar system on 2026-10-14: Yamashitakouhei is 2.42 au from the Sun and 2.99 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23465 |
| Provisional designation | 1989 UA1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.88 km (#15,502 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.446 |
| Absolute magnitude (H) | 14.61 |
| Orbital period | 3.28 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 1.80 – 2.62 au |
| Eccentricity | 0.186 |
| Inclination | 5.26° |
| Closest distance between its orbit and Earth's (MOID) | 0.795 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.