value quality siderealorsynodic author ref method 12.9160 2 Synodic Behrend LCDB Lightcurve 8.6091 2 Synodic Pal 2020ApJS..247...26P Lightcurve 8.6128 2 Sidereal Durech 2020A&A...643A..59D Model 8.6210 2 Synodic Warner 2006MPBu...33...85W Lightcurve