value quality siderealorsynodic author ref method 3.4460 2 Synodic Skiff 2019MPBu...46..458S Lightcurve 3.4460 2+ Synodic Skiff LCDB Lightcurve 3.4468 3 Synodic Kusnirak 2007CBET..792....1K Lightcurve 3.4468 3 Synodic Pravec LCDB Lightcurve