value quality siderealorsynodic author ref method 17.2688 2 Sidereal Durech 2023A&A...675A..24D Model 17.2695 2 Sidereal Durech 2019A&A...631A...2D Model 17.2960 2 Synodic Waszczak 2015AJ....150...75W Lightcurve