value quality siderealorsynodic author ref method 19.2300 2 Synodic Simpson 2013MPBu...40..146S Lightcurve 32.5291 2 Synodic Pal 2020ApJS..247...26P Lightcurve 33.0700 2 Synodic Behrend LCDB Lightcurve 43.2235 2 Sidereal Durech 2019A&A...631A...2D Model