 In October 2006, a rotational lightcurve of "Burnhamia" was obtained from photometric observations by Robert Buchheim at the Altimira Observatory in California.Lightcurve analysis gave a well-defined rotation period of hours with a brightness variation of magnitude ().The result supersedes previous observations by French amateur astronomer Laurent Bernasconi from May 2005, with a period of hours with an amplitude of magnitude (), and from October 2006, that gave a period of hours and an amplitude of magnitude ().