(9191) Hokuto Main-belt Asteroid
Discovered on 13 December 1991 by S. Otomo at Kiyosato.
Hokuto-shi is the largest city in Yamanashi-ken in Japan. The city, home to the discoverer, is famous for its beautiful starlit sky.Naming citation (20100527/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hokuto is today
Seen from above the solar system on 2026-10-14: Hokuto is 2.41 au from the Sun and 3.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9191 |
| Provisional designation | 1991 XU |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.57 km (#6,095 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.182 |
| Absolute magnitude (H) | 12.63 |
| Orbital period | 4.19 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.32 – 2.89 au |
| Eccentricity | 0.110 |
| Inclination | 11.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.35 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.