value quality siderealorsynodic author ref method 9.0700 3 Synodic Stephens 2020MPBu...47..125S Lightcurve 9.0736 2 Sidereal Durech 2023A&A...675A..24D Model 9.0740 2 Synodic Ferrero 2020MPBu...47..147F Lightcurve