value quality siderealorsynodic author ref method 42.5700 2 Synodic Stephens 2022MPBu...49..205S Lightcurve 42.9220 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 43.1387 2 Synodic Pal 2020ApJS..247...26P Lightcurve