value quality siderealorsynodic author ref method 2.2800 2 Synodic Warner 2015MPBu...42..256W Lightcurve 26.4300 2+ Synodic Warner 2017MPBu...44...22W Lightcurve 3.1240 2 Synodic Higgins 2005MPBu...32...36H Lightcurve