value quality siderealorsynodic author ref method 13.7100 2 Synodic Chang 2015ApJS..219...27C Lightcurve 13.7516 2 Sidereal Durech 2023A&A...675A..24D Model 13.9470 2 Synodic Waszczak 2015AJ....150...75W Lightcurve