value quality siderealorsynodic author ref method 5.8500 2 Synodic Chang 2015ApJS..219...27C Lightcurve 5.8540 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.8560 2 Synodic Waszczak 2015AJ....150...75W Lightcurve