(9693) Bleeker Main-belt Asteroid
Discovered on 24 September 1960 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Johan Bleeker (b. 1942), director of the Durch Space Research Organization and professor of space physics at Utrecht University, wrote many papers on x-ray astrophysics. The codiscoverer of the diffuse x-ray background of the sky, he was also the first author of discovery papers on the primary electrons in cosmic rays.Naming citation (20001111/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Bleeker is today
Seen from above the solar system on 2026-10-14: Bleeker is 2.93 au from the Sun and 3.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9693 |
| Provisional designation | 6547 P-L |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.38 |
| Orbital period | 3.78 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 1.92 – 2.94 au |
| Eccentricity | 0.210 |
| Inclination | 3.09° |
| Closest distance between its orbit and Earth's (MOID) | 0.915 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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- (483637) Johanstein
All asteroids named after someone called Johan
Also discovered on 24 September 1960
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- (1777) Gehrels
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- (1809) Prometheus
- (1810) Epimetheus
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