value quality siderealorsynodic author ref method 14.5440 2 Synodic Warner 2015MPBu...42..256W Lightcurve 14.9040 3 Synodic Pravec 1998Icar..136..124P Lightcurve 15.0000 2 Sidereal Benner 1999Icar..139..309B Model