value quality siderealorsynodic author ref method 3.7274 2 Sidereal Durech 2023A&A...675A..24D Model 3.7274 2 Sidereal Durech 2020A&A...643A..59D Model 3.7300 3 Synodic Sergison 2010MPBu...37...33S Lightcurve