value quality siderealorsynodic author ref method 10.2400 2 Synodic Hess 2016MPBu...43...87H Lightcurve 10.2880 2 Synodic Albers 2010MPBu...37..152A Lightcurve 156.4180 2 Sidereal Durech 2020A&A...643A..59D Model