 According to the survey carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), "Ulrike" measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively.The "Collaborative Asteroid Lightcurve Link" adopts the results from IRAS, that is an albedo of 0.083 and a diameter of 33.43 kilometers based on an absolute magnitude of 10.7.The WISE team also published an alternative mean-diameter of () with an albedo of ().