value quality siderealorsynodic author ref method 2.3560 2+ Synodic Borisov 2021MPBu...48..268B Lightcurve 2.4000 3 Synodic Rowe 2018MPBu...45..292R Lightcurve 2.4055 3 Synodic Warner 2018MPBu...45..138W Lightcurve