value quality siderealorsynodic author ref method 3.8660 2 Synodic Alvarez 2004Icar..172..388A Lightcurve 3.8849 2 Sidereal Hanus 2016A&A...586A.108H Model 3.8850 2 Sidereal Durech 2023A&A...675A..24D Model