value quality siderealorsynodic author ref method 3.1842 3 Synodic Benishek 2023MPBu...50...62B Lightcurve 3.1846 3 Synodic Pravec LCDB Lightcurve 3.1850 2+ Synodic Skiff 2023MPBu...50...74S Lightcurve 3.1850 3 Synodic Skiff 2023MPBu...50...74S Lightcurve