[2] It has also been characterized as a metallic M-type and carbonaceous C-type by the Wide-field Infrared Survey Explorer (WISE) and Pan-STARRS, respectively.
[5][8][11] In May 2007, a rotational lightcurve of Omsk was obtained from photometric observations at the Mount Tarana Observatory (431) in Bathurst, Australia.
Lightcurve analysis gave a well-defined rotation period of 7.275 hours with a brightness amplitude of 0.28 magnitude (U=3).
[5][10] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Omsk measures between 13.43 and 16.59 kilometers in diameter and its surface has an albedo between 0.1569 and 0.2476.
[4][6][7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1619 and a diameter of 14.42 kilometers based on an absolute magnitude of 11.8.