value quality siderealorsynodic author ref method 4.5930 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve 5.0800 2 Synodic Ellsworth 2002MPBu...29...68E Lightcurve 5.0860 2 Synodic Polakis 2019MPBu...46..132P Lightcurve 5.1000 2 Synodic Hawkins 2008MPBu...35....1H Lightcurve