(8543) Tsunemi Main-belt Asteroid
Discovered on 15 December 1993 by T. Kobayashi at Oizumi.
Hiroshi Tsunemi (b. 1951), Osaka University, has worked in x-ray astronomy as a chief scientist of the x-ray observing satellite ASCA. His scientific interest is focused on the structure and chemical composition of supernova remnants and related high-energy phenomena, as well as on the design of new x-ray detectors.Naming citation (20020921/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tsunemi is today
Seen from above the solar system on 2026-10-14: Tsunemi is 1.88 au from the Sun and 1.38 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 8543 |
| Provisional designation | 1993 XO1 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.43 |
| Orbital period | 3.39 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.88 – 2.63 au |
| Eccentricity | 0.166 |
| Inclination | 4.29° |
| Closest distance between its orbit and Earth's (MOID) | 0.874 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Hiroshi
- (4965) Takeda
- (5379) Abehiroshi
- (5830) Simohiro
- (6244) Okamoto
- (7250) Kinoshita
- (7254) Kuratani
- (7264) Hirohatanaka
- (8197) Mizunohiroshi
- (8707) Arakihiroshi
- (8891) Irokawa
- (8923) Yamakawa
- (9226) Arimahiroshi
All asteroids named after someone called Hiroshi