value quality siderealorsynodic author ref method 5.0756 2 Synodic Pal 2020ApJS..247...26P Lightcurve 5.0760 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.6780 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve