value quality siderealorsynodic author ref method 5.0613 2 Synodic Pal 2020ApJS..247...26P Lightcurve 5.0620 3 Synodic Stephens 2017MPBu...44..321S Lightcurve 5.0652 2 Sidereal Durech 2020A&A...643A..59D Model