value quality siderealorsynodic author ref method 7.9500 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 7.9502 2 Sidereal Durech 2018A&A...617A..57D Model 7.9530 2 Synodic Waszczak 2015AJ....150...75W Lightcurve