value quality siderealorsynodic author ref method 135.2000 2 Synodic Polakis 2020MPBu...47..314P Lightcurve 138.0000 2+ Synodic Stephens 2010MPBu...37..159S Lightcurve 5.1090 2- Synodic Behrend LCDB Lightcurve