value quality siderealorsynodic author ref method 38.6200 3- Synodic Vander Haagen 2011MPBu...38...10V Lightcurve 38.6900 3 Synodic Skiff 2012MPBu...39..111S Lightcurve 38.7100 3- Synodic Skiff 2019MPBu...46..238S Lightcurve