value quality siderealorsynodic author ref method 7.3700 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 7.3718 2 Sidereal Durech 2018A&A...617A..57D Model 7.3780 2 Synodic Waszczak 2015AJ....150...75W Lightcurve