 In 2016, concurring sidereal periods of 67.905 and 67.911 hours were obtained from modeled photometric observations derived from the Lowell Photometric Database and other sources ().According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Gaby" measures between 10.75 and 11.01 kilometers in diameter, and its surface has an albedo between 0.253 and 0.278.The "Collaborative Asteroid Lightcurve Link" adopts Petr Pravec's revised WISE data with an albedo of 0.2532 and a diameter of 11.01 kilometers using an absolute magnitude of .