value quality siderealorsynodic author ref method 3.4666 2 Sidereal Durech 2019A&A...631A...2D Model 3.4666 2 Sidereal Durech 2023A&A...675A..24D Model 3.7410 2 Synodic Waszczak 2015AJ....150...75W Lightcurve