value quality siderealorsynodic author ref method 10.1960 2 Synodic Pal 2020ApJS..247...26P Lightcurve 10.1969 2 Sidereal Durech 2023A&A...675A..24D Model 10.1980 2 Synodic McNeill 2019ApJS..245...29M Lightcurve