(6978) Hironaka Main-belt Asteroid
Discovered on 12 September 1993 by Endate, K., Watanabe, K. at Kitami.
Named in honor of Heisuke Hironaka (b. 1931), Japanese mathematician who was awarded the Fields Medal in 1970. He proved the theorem of resolution of singularity.Naming citation (19980808/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hironaka is today
Seen from above the solar system on 2026-10-14: Hironaka is 2.57 au from the Sun and 1.58 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 6978 |
| Provisional designation | 1993 RD |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 13.66 |
| Orbital period | 4.10 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 2.12 – 3.01 au |
| Eccentricity | 0.173 |
| Inclination | 7.46° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 12 September 1993
- (6979) Shigefumi
- (7192) Cieletespace
- (8097) Yamanishi
- (9975) Takimotokoso
- (14469) Komatsuataka
- (46608) Yoshinokeiji