value quality siderealorsynodic author ref method 8.6400 2 Synodic Behrend LCDB Lightcurve 8.6420 2 Synodic Behrend LCDB Lightcurve 9.8216 2 Sidereal Durech 2020A&A...643A..59D Model 9.8230 3 Synodic Fauerbach 2008MPBu...35...44F Lightcurve