value quality siderealorsynodic author ref method 4.9665 2 Synodic Pal 2020ApJS..247...26P Lightcurve 9.9290 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 9.9321 2 Sidereal Durech 2023A&A...675A..24D Model