value quality siderealorsynodic author ref method 16.4500 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 16.5074 2 Synodic Pal 2020ApJS..247...26P Lightcurve 16.5330 2 Synodic Waszczak 2015AJ....150...75W Lightcurve