value quality siderealorsynodic author ref method 4.4538 2 Sidereal Durech 2023A&A...675A..24D Model 4.4538 2 Sidereal Durech 2019A&A...631A...2D Model 4.4538 2 Sidereal Durech 2018A&A...617A..57D Model 4.6710 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve