value quality siderealorsynodic author ref method 3.3800 2 Synodic Franco 2015MPBu...42..114F Lightcurve 3.3800 2 Synodic Franco 2022MPBu...49...35F Lightcurve 3.3820 2 Synodic Benishek 2022MPBu...49...38B Lightcurve