value quality siderealorsynodic author ref method 3.7770 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 3.7774 2 Synodic Pal 2020ApJS..247...26P Lightcurve 3.7778 2 Sidereal Durech 2023A&A...675A..24D Model