value quality siderealorsynodic author ref method 14.7700 2 Synodic Chang 2015ApJS..219...27C Lightcurve 28.6700 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 29.2300 2 Synodic Waszczak 2015AJ....150...75W Lightcurve