value quality siderealorsynodic author ref method 3.5640 3 Synodic Benishek 2020MPBu...47...75B Lightcurve 3.5770 3 Synodic Benishek 2021MPBu...48..280B Lightcurve 3.5770 3 Synodic Pray 2005MPBu...32....8P Lightcurve