 In January 2002, a rotational lightcurve of "Erynia" was obtained from photometric observations by French astronomer Laurent Bernasconi.Lightcurve analysis gave a rotation period of hours with a high brightness variation of magnitude, indicative of an non-spherical, elongated shape ().A concurring period of hours and an amplitude 0.47 magnitude was obtained by astronomers at the Palomar Transient Factory in April 2010 ().