 It gave a concurring sidereal period of hours and includes a partial spin axis at (β1 −53.0°) in ecliptic coordinates (λ, β).According to the survey carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's WISE telescope, "Ilsebill" measures (), () and () kilometers in diameter and its surface has a low albedo of (), () and (), respectively.The "Collaborative Asteroid Lightcurve Link" derives its estimate from IRAS, that is, an albedo of 0.0638 and a diameter of 27.62 km based on an absolute magnitude of 11.4.