 In 1926, it was first identified as , extending the body's observation arc by 5 years prior to its official discovery observation.In September 2009, two rotational lightcurves of "Nanna" were obtained by American astronomer Brian Warner from photometric observations at his Palmer Divided Observatory in Colorado.The first lightcurve analysis gave a rotation period of 18.54 hours with a brightness variation of 0.12 magnitude (), while the second lightcurve was ambiguous giving a period of 25.80 and 12.90 hours, respectively, and an amplitude of 0.15 ().