value quality siderealorsynodic author ref method 17.3800 2 Synodic Behrend LCDB Lightcurve 17.3849 3 Synodic Behrend LCDB Lightcurve 17.3850 2 Sidereal Durech 2020A&A...643A..59D Model 17.3900 2 Synodic Waszczak 2015AJ....150...75W Lightcurve