value quality siderealorsynodic author ref method 5.3000 2 Synodic Chang 2015ApJS..219...27C Lightcurve 5.3070 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.4300 2 Synodic Erasmus 2019ApJS..242...15E Lightcurve