(15252) Yoshiken Main-belt Asteroid
Discovered on 20 July 1990 by T. Seki at Geisei.
Kenichi Yoshioka (b. 1948) was a primary school principal. He joined the staff of Geisei Observatory in 2008 and is involved in astronomy education for children.Naming citation (MPC batch dated 2013-09-19), IAU / Minor Planet Center, via NASA/JPL
Where Yoshiken is today
Seen from above the solar system on 2026-10-14: Yoshiken is 2.49 au from the Sun and 1.75 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15252 |
| Provisional designation | 1990 OD1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.38 km (#14,261 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.425 |
| Rotation period | 22.2 hours |
| Absolute magnitude (H) | 14.2 |
| Orbital period | 3.53 years |
| Semi-major axis | 2.32 au |
| Perihelion – aphelion | 2.01 – 2.62 au |
| Eccentricity | 0.133 |
| Inclination | 7.52° |
| Closest distance between its orbit and Earth's (MOID) | 0.994 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.