(6225) Hiroko Main-belt Asteroid
Discovered on 1 March 1981 by S. J. Bus at Siding Spring.
Hiroko Nagahara (b. 1952), professor at the University of Tokyo, has studied a wide array of meteoritic materials and made fundamental contributions to our understanding of chondrule formation, condensation and evaporation in the solar nebula, and partial melting of minor planets.Naming citation (20020624/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hiroko is today
Seen from above the solar system on 2026-10-14: Hiroko is 2.17 au from the Sun and 2.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6225 |
| Provisional designation | 1981 EK12 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.10 km (#16,919 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.331 |
| Absolute magnitude (H) | 15.34 |
| Orbital period | 3.29 years |
| Semi-major axis | 2.21 au |
| Perihelion – aphelion | 2.14 – 2.29 au |
| Eccentricity | 0.0339 |
| Inclination | 5.35° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 March 1981
- (2788) Andenne
- (3016) Meuse
- (3029) Sanders
- (3030) Vehrenberg
- (3042) Zelinsky
- (3058) Delmary
- (3075) Bornmann
- (3135) Lauer
- (3308) Ferreri
- (3472) Upgren
- (3498) Belton
- (3503) Brandt