 A first precovery was taken at Lowell Observatory in February 1931, extending the body's observation arc by 3 weeks prior to its official discovery observation at Heidelberg.In May 1984, a first rotational lightcurve of "Irmela" was obtained from photometric observations by American astronomer Richard Binzel.Lightcurve analysis gave a rotation period of 19.17 hours with a brightness variation of 0.34 magnitude ().