(15868) Akiyoshidai Main-belt Asteroid
Discovered on 16 July 1996 by A. Nakamura at Kuma Kogen.
Akiyoshidai, located at the center of Yamaguchi prefecture, is the biggest karst plateau in Japan, with an area of 130 square kilometers. Beneath the plateau, 380 caverns have been discovered, including Akiyoshido Cavern, the largest cavern in Japan.Naming citation (20010109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Akiyoshidai is today
Seen from above the solar system on 2026-10-14: Akiyoshidai is 1.94 au from the Sun and 2.22 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15868 |
| Provisional designation | 1996 OL |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.63 km (#9,510 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Absolute magnitude (H) | 15.21 |
| Orbital period | 3.38 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.88 – 2.63 au |
| Eccentricity | 0.166 |
| Inclination | 4.53° |
| Closest distance between its orbit and Earth's (MOID) | 0.871 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.