value quality siderealorsynodic author ref method 10.2283 2 Synodic Behrend LCDB Lightcurve 9.4253 2 Sidereal Hanus 2016A&A...586A.108H Model 9.4270 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve 9.4340 3 Synodic Owings 2013MPBu...40....8O Lightcurve