value quality siderealorsynodic author ref method 3.8603 2 Sidereal Durech 2023A&A...675A..24D Model 57.3600 2 Synodic Stephens 2022MPBu...49..314S Lightcurve 7.4900 2 Synodic Clark 2019MPBu...46..346C Lightcurve