value quality siderealorsynodic author ref method 12.0000 1 Synodic Behrend LCDB Lightcurve 12.0000 1 Synodic Zappala 1989Icar...82..354Z Lightcurve 15.7590 3 Synodic Stephens 2019MPBu...46...73S Lightcurve 15.7680 3 Synodic Stephens 2020MPBu...47...43S Lightcurve 15.8700 3 Synodic Stephens 2021MPBu...48..167S Lightcurve 15.8890 2+ Synodic Stephens 2018MPBu...45...48S Lightcurve 22.5000 1+ Synodic Behrend LCDB Lightcurve 31.5200 2 Synodic Stephens 2010MPBu...37...47S Lightcurve 31.5400 2 Synodic Stephens 2016MPBu...43..323S Lightcurve