value quality siderealorsynodic author ref method 2.3920 2+ Synodic Stephens 2018MPBu...45...50S Lightcurve 2.3923 2+ Synodic Pravec LCDB Lightcurve 2.3923 2 Sidereal Athanasopoulos 2024A%26A...690A.215A Model 2.3924 2+ Synodic Pravec LCDB Lightcurve