value quality siderealorsynodic author ref method 3.8563 2 Sidereal Durech 2023A&A...675A..24D Model 3.8564 2 Sidereal Durech 2019A&A...631A...2D Model 3.8565 3 Synodic Durkee 2010MPBu...37..125D Lightcurve