Ondřejov orbits the Sun in the central main-belt at a distance of 2.3–3.0 AU once every 4 years and 4 months (1,594 days).
[8] In December 2011, a rotational lightcurve of Ondřejov was obtained from photometric observations taken at the Palomar Transient Factory in California.
[6] According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 5.9 kilometers in diameter and its surface has an albedo of 0.18,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a lower albedo of 0.10 and calculates a diameter of 6.3 kilometers with an absolute magnitude of 14.14.
In 1953, the observatory was integrated into the Astronomical Institute and is now also owned by the Academy of Sciences of the Czech Republic.
[2] The approved naming citation was published by the Minor Planet Center on 22 February 1997 (M.P.C.