As of 2019, the rotation period of 2002 MS is unknown. Observations in 2005 and 2011 showed possible periods of either 7.33 hours or its alias 10.44 hours (single-peaked), or twice those values for the double-peaked solution, with a small light curve amplitude of 0.05±0.01 mag. Light curve observations of 2002 MS are difficult because of the dense field of background stars it is crossing. Observations made in June and July 2011 took advantage of 2002 MS moving in front of a dark nebula.