(125473) Keisaku Main-belt Asteroid
Discovered on 20 November 2001 by A. Nakamura at Kuma Kogen.
Keisaku Ninomiya (1804-1862) was a medical doctor who studied Western medicine and pharmaceutics under the German doctor P. F. von Siebold in Nagasaki. Keisaku is the foster father and teacher of Ine Kusumoto, who was the first female practitioner to master Western medicine in Japan.Naming citation (20091202/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Keisaku is today
Seen from above the solar system on 2026-10-14: Keisaku is 2.58 au from the Sun and 3.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 125473 |
| Provisional designation | 2001 WP14 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 17.07 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.88 – 2.68 au |
| Eccentricity | 0.174 |
| Inclination | 4.84° |
| Closest distance between its orbit and Earth's (MOID) | 0.875 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.