value quality siderealorsynodic author ref method 5.3190 2- Synodic Mottola 2011AJ....141..170M Lightcurve 5.3400 2+ Synodic Stephens 2022MPBu...49...51S Lightcurve 5.8500 1 Synodic Stephens 2015MPBu...42R.216S Lightcurve