It was officially discovered on 15 August 1928, by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula.
[4] In the more refined SDSS-based taxonomy, it is characterized as an uncommon L-type,[12] which is similar to a K-type, the overall spectral type of the Eoan asteroids.
[13]: 23 In October 2007, a rotational lightcurve of Polonia was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado.
Lightcurve analysis gave a long rotation period of 82.5 hours with a brightness amplitude of 0.20 magnitude (U=2).
[7][8][9][10] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1319 and a diameter of 35.76 kilometers based on an absolute magnitude of 10.05.