 In 1977, a rotational lightcurve of "Geertruida" was obtained from photometric observations by Swedish astronomer Claes-Ingvar Lagerkvist at the Uppsala Southern Station in Australia.Lightcurve analysis gave a rotation period of 5.50 hours with a brightness amplitude of 0.5 magnitude ().In October 2016, a refined period of 5.5087 hours with an amplitude of 0.35 magnitude () was obtained at the Oakley Southern Sky Observatory ().