 These observations gave a concurring period of (), () and () hours with an amplitude of (), () and () magnitude, respectively.According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), "Mellena" measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0884 and a diameter of 18.64 kilometers based on an absolute magnitude of 11.9.