value quality siderealorsynodic author ref method 21.7000 1 Synodic Pravec 1997Icar..130..275P Lightcurve 25.7964 2 Synodic Pal 2020ApJS..247...26P Lightcurve 76.0000 2 Synodic Pravec LCDB Lightcurve 76.0000 2 Synodic Pravec LCDB Lightcurve