value quality siderealorsynodic author ref method 10.8500 2 Synodic Behrend LCDB Lightcurve 10.8620 1 Synodic Behrend LCDB Lightcurve 16.4300 2+ Synodic Alvarez 2012MPBu...39...21A Lightcurve 8.2150 2 Synodic Brines 2017MPBu...44..145B Lightcurve