value quality siderealorsynodic author ref method 2.7584 3 Synodic Benishek 2022CBET.5170....1B Lightcurve 2.7595 2+ Synodic Oey 2013MPBu...40..169O Lightcurve 2.7600 3 Synodic Higgins 2011MPBu...38...46H Lightcurve