value quality siderealorsynodic author ref method 393.4970 2 Synodic Pal 2020ApJS..247...26P Lightcurve 408.1630 2 Synodic McNeill 2019ApJS..245...29M Lightcurve 42.7410 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve