(10152) Ukichiro Main-belt Asteroid
Discovered on 11 September 1994 by S. Otomo at Kiyosato.
Ukichiro Nakaya (1900-1962), professor of physics at Hokkaido University, studied the crystalline structure of snow and in 1935 succeeded in making artificial snow for the first time.Naming citation (20031110/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ukichiro is today
Seen from above the solar system on 2026-10-14: Ukichiro is 2.20 au from the Sun and 2.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10152 |
| Provisional designation | 1994 RJ11 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.61 km (#11,415 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.363 |
| Rotation period | 5.18 hours |
| Absolute magnitude (H) | 13.75 |
| Orbital period | 3.63 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 2.02 – 2.70 au |
| Eccentricity | 0.143 |
| Inclination | 6.51° |
| Closest distance between its orbit and Earth's (MOID) | 1.02 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.