(10224) Hisashi Main-belt Asteroid
Discovered on 26 October 1997 by N. Sato at Chichibu.
Hisashi Hirabayashi (b. 1943), senior chief officer of JAXA Space Education and director of the Space Education Center, led the Very Long Baseline Interferometer and Space Observatory Program with the radio satellite HALCA that successfully revealed active galactic nuclei.Naming citation (20090409/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hisashi is today
Seen from above the solar system on 2026-10-14: Hisashi is 2.34 au from the Sun and 3.25 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10224 |
| Provisional designation | 1997 UK22 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.51 km (#6,145 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0560 |
| Rotation period | 8.26 hours |
| Absolute magnitude (H) | 14.52 |
| Orbital period | 3.79 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 2.02 – 2.84 au |
| Eccentricity | 0.168 |
| Inclination | 3.44° |
| Closest distance between its orbit and Earth's (MOID) | 1.01 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 26 October 1997
- (8232) Akiramizuno
- (27982) Atsushimiyazaki
- (27983) Bernardi
- (29470) Higgs
- (31153) Enricaparri
- (33054) Eduardorossi
- (55873) Shiomidake
- (85515) Annakukharskaya
- (120741) Iijimayuichi