value quality siderealorsynodic author ref method 5.3730 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.3739 2 Synodic Pal 2020ApJS..247...26P Lightcurve 5.3750 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve