value quality siderealorsynodic author ref method 13.7980 2 Synodic Warner 2005MPBu...32...90W Lightcurve 32.7314 2 Synodic Pal 2020ApJS..247...26P Lightcurve 32.7524 2 Sidereal Durech 2020A&A...643A..59D Model