セロ・トロロ汎米天文台
In August 2017, a rotational lightcurve of "Argelander" was obtained from photometric observations at the Chilean Cerro Tololo Inter-American Observatory using the SARA South Telescope. Lightcurve analysis gave a rotation period of hours and a brightness variation of 0.48 magnitude (). In January 2012, astronomers at the Palomar Transient Factory had also determined a period of with an amplitude of 0.41 magnitude ().