value quality siderealorsynodic author ref method 10.0000 2 Synodic Lagerkvist 1978A&AS...31..361L Lightcurve 8.4000 2 Synodic Franco 2021MPBu...48..372F Lightcurve 8.4008 2 Synodic Pal 2020ApJS..247...26P Lightcurve 8.4010 3 Synodic Koff 2006MPBu...33...31K Lightcurve 8.4130 3 Synodic Polakis 2021MPBu...48..394P Lightcurve