value quality siderealorsynodic author ref method 12.4620 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 12.4704 2 Sidereal Durech 2018A&A...617A..57D Model 12.5200 2 Synodic Binzel 1987Icar...72..135B Lightcurve