value quality siderealorsynodic author ref method 16.7160 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 16.7288 2 Sidereal Durech 2020A&A...643A..59D Model 16.7290 2 Sidereal Durech 2023A&A...675A..24D Model