value quality siderealorsynodic author ref method 25.5629 2 Synodic Pal 2020ApJS..247...26P Lightcurve 25.6260 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 25.6420 2 Sidereal Durech 2023A&A...675A..24D Model