(10540) Hachigoroh Main-belt Asteroid
Discovered on 13 November 1991 by S. Otomo at Kiyosato.
Hachigoroh Kikuchi (1926-1999) was the executive committee chief of the Haramura star party and was instrumental in getting it started. The name was suggested by S. Horiuchi.Naming citation (20040713/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hachigoroh is today
Seen from above the solar system on 2026-10-14: Hachigoroh is 3.52 au from the Sun and 4.51 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10540 |
| Provisional designation | 1991 VP4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.1 km (#4,509 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0820 |
| Rotation period | 4.66 hours |
| Absolute magnitude (H) | 13.4 |
| Orbital period | 5.46 years |
| Semi-major axis | 3.10 au |
| Perihelion – aphelion | 2.57 – 3.63 au |
| Eccentricity | 0.171 |
| Inclination | 6.74° |
| Closest distance between its orbit and Earth's (MOID) | 1.59 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.