value quality siderealorsynodic author ref method 3.1870 3 Synodic Benishek 2023MPBu...50..142B Lightcurve 3.1906 3 Synodic Benishek LCDB Lightcurve 3.1920 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 3.1950 2 Synodic Polakis LCDB Lightcurve