value quality siderealorsynodic author ref method 5.4200 2 Synodic Chang 2015ApJS..219...27C Lightcurve 5.4790 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.4830 2 Synodic Waszczak 2015AJ....150...75W Lightcurve