 The asteroid's observation arc begins at Uccle Observatory in 1935, twelve years after its official discovery observation at Simeiz.According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, "Arago" measures between 48.57 and 68.404 kilometers in diameter and its surface has an albedo between 0.0498 and 0.08.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0582 and a diameter of 57.69 kilometers based on an absolute magnitude of 9.9.