value quality siderealorsynodic author ref method 4.4958 2 Sidereal Durech 2018A&A...617A..57D Model 4.5080 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 4.5100 2 Synodic Chang 2015ApJS..219...27C Lightcurve