value quality siderealorsynodic author ref method 3.0280 2 Synodic Clark 2003MPBu...30....4C Lightcurve 3.0290 2 Synodic Polakis 2020MPBu...47...13P Lightcurve 3.0300 3 Synodic Benishek 2020MPBu...47..231B Lightcurve