(16817) Onderlicka Main-belt Asteroid
Discovered on 30 October 1997 by P. Pravec at Ondrejov.
Bedřich Onderlička (1923-1994) was a prominent Czech astrophysicist and enthusiastic pedagogue, head of the department of astrophysics of Masaryk University in Brno. He specialized in stellar kinematics and chemistry of late-type stars.Naming citation (20010109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Onderlicka is today
Seen from above the solar system on 2026-10-14: Onderlicka is 2.76 au from the Sun and 2.91 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 16817 |
| Provisional designation | 1997 UU10 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.27 km (#8,551 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0530 |
| Absolute magnitude (H) | 15.04 |
| Orbital period | 3.79 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 2.07 – 2.79 au |
| Eccentricity | 0.149 |
| Inclination | 4.02° |
| Closest distance between its orbit and Earth's (MOID) | 1.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.