In 1987, it was reported that Rezia has a flat spectrum and IRAS albedo value pv=0.54 ± 0.0004, which is very dark and consistent with a C-type asteroid.Vilas, Faith and McFadden, Lucy Ann. New CCD Reflectance Spectra of Outer Belt Asteroids, Bulletin of the American Astronomical Society, Vol. 19, p.825 (1987)
