value quality siderealorsynodic author ref method 3.6750 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve 3.6751 2 Sidereal Durech 2020A&A...643A..59D Model 3.6800 2 Synodic Chang 2016ApJS..227...20C Lightcurve 4.6590 3 Synodic Behrend LCDB Lightcurve