value quality siderealorsynodic author ref method 11.3820 3 Synodic Stephens 2021MPBu...48..380S Lightcurve 11.3890 2+ Synodic Higgins 2005MPBu...32...13H Lightcurve 11.3910 2 Synodic Pal 2020ApJS..247...26P Lightcurve