value quality siderealorsynodic author ref method 9.5060 2+ Synodic Behrend LCDB Lightcurve 9.5100 2+ Synodic Behrend LCDB Lightcurve 9.5320 2 Sidereal Durech 2020A&A...643A..59D Model 9.5364 2 Synodic Pal 2020ApJS..247...26P Lightcurve