value quality siderealorsynodic author ref method 3.8070 3 Synodic Warner 2018MPBu...45...39W Lightcurve 3.8200 2- Synodic Chang 2014ApJ...788...17C Lightcurve 3.8260 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve