sentences:  From 2007 to 2012, several photometric lightcurve observations of "Yugoslavia" established a well-defined rotation period of 3.89 hours with a brightness variation between 0.64 and 0.74 magnitude ().According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Yugoslavia" measures between 14.73 and 21.39 kilometers in diameter, and its surface has an albedo between 0.070 and 0.269.The "Collaborative Asteroid Lightcurve Link" assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 15.94 kilometers with an absolute magnitude of 11.3.