value quality siderealorsynodic author ref method 181.3610 2 Synodic Pal 2020ApJS..247...26P Lightcurve 3.0784 2 Sidereal Durech 2020A&A...643A..59D Model 3.0785 3 Synodic Alvarez 2014MPBu...41..175A Lightcurve