value quality siderealorsynodic author ref method 13.1900 2 Synodic Behrend LCDB Lightcurve 13.1907 3 Synodic Behrend LCDB Lightcurve 13.1910 3 Synodic Harris 1989Icar...81..314H Lightcurve 26.3000 1 Synodic Zappala 1983Icar...56..325Z Lightcurve