value quality siderealorsynodic author ref method 6.1100 1+ Synodic Chang 2016ApJS..227...20C Lightcurve 9.8400 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 9.8500 2 Synodic Waszczak 2015AJ....150...75W Lightcurve