 In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a period 9.86687 hours, as well as a partial spin axis of (n.a.°, –59.0°) in ecliptic coordinates (λ, β).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, "Richilde" measures between 30.70 and 39.58 kilometers in diameter and its surface has an albedo between 0.044 and 0.07.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0517 and a diameter of 35.22 kilometers based on an absolute magnitude of 11.10.