 According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, "Katja" measures between 38.20 and 51.949 kilometers in diameter and its surface has an albedo between 0.1144 and 0.211.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.2253 and a diameter of 38.65 kilometers based on an absolute magnitude of 9.3.This minor planet was named for Ekaterina ("Katja") Iosko, a laboratory assistant and orbit calculator at the discovering Simeiz Observatory ().