 According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite, "Petropolitana" measures (), () and () kilometers in diameter and its surface has a albedo of (), () and (), respectively.Alternative mean-diameters published by the WISE team include () and () with corresponding albedos of () and ().The "Collaborative Asteroid Lightcurve Link", adopts the results obtained by IRAS, that is an albedo of 0.2382 and a diameter of 41.22 kilometers based on an absolute magnitude of 9.10.