value quality siderealorsynodic author ref method 2.6940 3 Synodic Benishek 2022MPBu...49...38B Lightcurve 2.6951 3 Synodic Pravec LCDB Lightcurve 2.6955 3 Synodic Benishek 2018CBET.4561....1B Lightcurve