value quality siderealorsynodic author ref method 15.2200 2 Synodic Warner 2008MPBu...35..163W Lightcurve 2.4620 2 Synodic Warner 2013MPBu...40..221W Lightcurve 2.4629 3 Synodic Warner 2013MPBu...40..221W Lightcurve