value quality siderealorsynodic author ref method 5.8564 2 Synodic Pal 2020ApJS..247...26P Lightcurve 5.8580 3- Synodic Klinglesmith 2013MPBu...40..154K Lightcurve 5.8580 3 Synodic Benishek 2021MPBu...48...77B Lightcurve