value quality siderealorsynodic author ref method 8.4958 3 Synodic Pravec 1998Icar..136..124P Lightcurve 8.4960 3 Synodic Krugly 2002Icar..158..294K Lightcurve 8.5000 3 Synodic Warner 2020MPBu...47..200W Lightcurve 8.5100 3 Synodic Warner 2015MPBu...42..172W Lightcurve