value quality siderealorsynodic author ref method 3.3600 2 Synodic Ferrero 2021MPBu...48..215F Lightcurve 5.8700 2 Synodic Chang 2019ApJS..241....6C Lightcurve 6.7199 3 Synodic Pravec LCDB Lightcurve 6.7200 3 Synodic Benishek 2021MPBu...48..280B Lightcurve 6.7201 2 Sidereal Durech 2020A&A...643A..59D Model