value quality siderealorsynodic author ref method 9.6990 3 Synodic Stephens 2019MPBu...46..180S Lightcurve 9.7725 2+ Synodic Oey 2013MPBu...40..169O Lightcurve 9.7780 2 Sidereal Athanasopoulos 2024A%26A...690A.215A Model 9.7787 2 Synodic Pravec LCDB Lightcurve