value quality siderealorsynodic author ref method 5.5610 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.5620 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.5634 2 Sidereal Durech 2020A&A...643A..59D Model