value quality siderealorsynodic author ref method 5.3066 3 Synodic Skiff 2019MPBu...46..458S Lightcurve 5.3070 3 Synodic Durkee 2010MPBu...37...18D Lightcurve 5.3080 3 Synodic Koehn 2014MPBu...41..286K Lightcurve