 In May 2019, an alternative period determination of hours with an amplitude of magnitude was made by Tom Polakis at the Command Module Observatory in Arizona ().Additional, tentative lightcurves gave a period of () by French amateur astronomer Laurent Bernasconi in July 2004, () by Jean-Gabriel Bosch and Axel Martin in March 2007, and () by Bruno Christmann, David Augustin and Raoul Behrend in July 2019 ().In 2016, a modeled lightcurve gave a concurring sidereal period of hours using data from a large collaboration of individual observers (such as above).