value quality siderealorsynodic author ref method 18.8000 1 Synodic Dahlgren 1998Icar..133..247D Lightcurve 488.0630 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 489.7900 2 Sidereal Durech 2019A&A...631A...2D Model 52.0000 2 Synodic Behrend LCDB Lightcurve 6.4000 1 Synodic Aznar LCDB Lightcurve 6.8000 1 Synodic Binzel 1992Icar...95..222B Lightcurve