value quality siderealorsynodic author ref method 6.4480 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 6.4481 3- Synodic Pravec LCDB Lightcurve 6.4481 3 Synodic Oey 2019MPBu...46..119O Lightcurve 6.4481 3 Synodic Pravec LCDB Lightcurve 6.4493 2 Sidereal Durech 2020A&A...643A..59D Model