value quality siderealorsynodic author ref method 11.3740 3 Synodic Kalup 2021ApJS..254....7K Lightcurve 12.7000 2+ Synodic French 2012MPBu...39..183F Lightcurve 27.1120 2 Synodic Duffard 2008LPICo1405.8187D Lightcurve