value quality siderealorsynodic author ref method 3.5719 3 Synodic Behrend LCDB Lightcurve 3.5730 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 3.5730 2 Sidereal Durech 2023A&A...675A..24D Model 3.5730 2 Sidereal Durech 2018A&A...617A..57D Model