value quality siderealorsynodic author ref method 23.2198 2 Synodic Pal 2020ApJS..247...26P Lightcurve 3.0850 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 3.0900 2 Synodic Chang 2015ApJS..219...27C Lightcurve