value quality siderealorsynodic author ref method 2.7997 2 Sidereal Durech 2023A&A...675A..24D Model 2.7998 2 Synodic Pal 2020ApJS..247...26P Lightcurve 2.9740 2 Synodic Waszczak 2015AJ....150...75W Lightcurve