 According to the surveys carried out by the Japanese Akari satellite, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Infrared Astronomical Satellite IRAS, "Seraphina" measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0427 and a diameter of 59.75 kilometers based on an absolute magnitude of 10.16.Alternative mean-diameter measurements published by the WISE team include (), () and () with corresponding albedos of (), () and ().