value quality siderealorsynodic author ref method 15.4730 1 Synodic Clark 2008MPBu...35..152C Lightcurve 7.5460 3- Synodic Clark 2015MPBu...42..163C Lightcurve 7.5580 2 Synodic Pravec LCDB Lightcurve 7.5668 2 Synodic Pravec LCDB Lightcurve