value quality siderealorsynodic author ref method 3.9590 2+ Synodic Wisniewski 1997Icar..126..395W Lightcurve 4.7550 2 Sidereal Durech 2020A&A...643A..59D Model 4.7550 2 Sidereal Durech 2023A&A...675A..24D Model 4.7550 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve