(11657) Antonhajduk Main-belt Asteroid
Discovered on 5 March 1997 by Galad, A., Pravda, A. at Modra.
Anton Hajduk (b. 1933) is a professor of astronomy at the Slovak Academy of Sciences. His research centers on the structure of meteor streams and radio studies of meteor head echoes and the secondary ozone layer.Naming citation (20010309/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Antonhajduk is today
Seen from above the solar system on 2026-10-14: Antonhajduk is 1.99 au from the Sun and 2.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11657 |
| Provisional designation | 1997 EN7 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.97 |
| Orbital period | 3.46 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 1.85 – 2.73 au |
| Eccentricity | 0.192 |
| Inclination | 2.55° |
| Closest distance between its orbit and Earth's (MOID) | 0.839 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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