value quality siderealorsynodic author ref method 25.4000 2+ Synodic Warner 2009MPBu...36....7W Lightcurve 25.6147 2 Sidereal Durech 2020A&A...643A..59D Model 54.7720 2 Synodic Waszczak 2015AJ....150...75W Lightcurve