value quality siderealorsynodic author ref method 19.6403 2 Synodic Pal 2020ApJS..247...26P Lightcurve 9.8180 3 Synodic Stephens 2016MPBu...43...15S Lightcurve 9.8380 2+ Synodic Mottola 2011AJ....141..170M Lightcurve 9.8400 2+ Synodic Mottola 2011AJ....141..170M Lightcurve 9.8440 3 Synodic Kalup 2021ApJS..254....7K Lightcurve