value quality siderealorsynodic author ref method 5.6070 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve 5.6090 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.6100 2 Synodic Chang 2015ApJS..219...27C Lightcurve