value quality siderealorsynodic author ref method 5.4110 Synodic McNeill 2021PSJ.....2....6M Lightcurve 6.9680 3 Synodic Stephens 2020MPBu...47...43S Lightcurve 6.9870 3 Synodic Stephens 2017MPBu...44..312S Lightcurve 6.9903 3 Synodic Galad 2010MPBu...37....9G Lightcurve