value quality siderealorsynodic author ref method 6.0540 2 Synodic French 2013MPBu...40..198F Lightcurve 6.9310 3 Synodic Stephens 2022MPBu...49..117S Lightcurve 6.9370 3- Synodic Stephens 2020MPBu...47...43S Lightcurve 6.9410 3 Synodic Stephens 2020MPBu...47...43S Lightcurve