value quality siderealorsynodic author ref method 4.7409 2 Sidereal Durech 2020A&A...643A..59D Model 4.7415 2 Synodic Pal 2020ApJS..247...26P Lightcurve 4.7440 2 Synodic McNeill 2019ApJS..245...29M Lightcurve