value quality siderealorsynodic author ref method 101.6000 2 Synodic Polakis 2022MPBu...49..298P Lightcurve 101.8000 2+ Synodic Dose 2021MPBu...48..125D Lightcurve 8.7100 2 Synodic Hess 2016MPBu...43...87H Lightcurve