value quality siderealorsynodic author ref method 7.3300 2 Synodic Chang 2015ApJS..219...27C Lightcurve 7.3530 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 7.3540 2 Synodic Waszczak 2015AJ....150...75W Lightcurve