value quality siderealorsynodic author ref method 13.6926 2 Synodic Pal 2020ApJS..247...26P Lightcurve 13.6955 2 Sidereal Hanus 2011A&A...530A.134H Model 13.6958 3 Synodic Behrend LCDB Lightcurve 13.7000 3 Synodic Di Martino 1984Icar...60..541D Lightcurve