value quality siderealorsynodic author ref method 5.8530 3 Synodic Albers 2010MPBu...37..152A Lightcurve 5.8552 2 Sidereal Durech 2023A&A...675A..24D Model 5.8556 2 Sidereal Durech 2018A&A...617A..57D Model