value quality siderealorsynodic author ref method 15.5620 2+ Synodic Behrend LCDB Lightcurve 15.5745 2 Sidereal Durech 2019A&A...631A...2D Model 15.5760 2 Synodic Behrend LCDB Lightcurve 15.5770 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve 15.5900 3 Synodic Galad 2007EM&P..101...17G Lightcurve