value quality siderealorsynodic author ref method 3.3959 2 Sidereal Durech 2020A&A...643A..59D Model 3.3960 2 Synodic Pal 2020ApJS..247...26P Lightcurve 3.3960 3 Synodic Pravec LCDB Lightcurve 3.3961 3 Synodic Pravec LCDB Lightcurve 3.6550 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve