value quality siderealorsynodic author ref method 11.5500 2 Synodic Behrend LCDB Lightcurve 11.5500 2 Synodic Behrend LCDB Lightcurve 11.6538 2 Sidereal Durech 2019A&A...631A...2D Model 11.6540 3 Synodic Fleenor 2007MPBu...34..129F Lightcurve