(5328) Nisiyamakoiti Main-belt Asteroid
Discovered on 26 October 1989 by Ueda, S., Kaneda, H. at Kushiro.
Koichi Nishiyama (b. 1938) is an amateur astronomer who has observed meteors and searched for comets for many years. He discovered a nova in M33 in 2007. Also known as a mountaineer, he has climbed Kilimanjaro, Elbrus and Aconcagua.Naming citation (20080520/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Nisiyamakoiti is today
Seen from above the solar system on 2026-10-14: Nisiyamakoiti is 2.11 au from the Sun and 1.41 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5328 |
| Provisional designation | 1989 UH1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.48 km (#11,675 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.318 |
| Absolute magnitude (H) | 14.0 |
| Orbital period | 3.74 years |
| Semi-major axis | 2.41 au |
| Perihelion – aphelion | 2.07 – 2.75 au |
| Eccentricity | 0.141 |
| Inclination | 6.92° |
| Closest distance between its orbit and Earth's (MOID) | 1.07 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.