value quality siderealorsynodic author ref method 11.2915 2 Sidereal Durech 2020A&A...643A..59D Model 11.2947 3 Synodic Brincat 2016MPBu...43..200B Lightcurve 6.0000 2 Synodic Chavez 2016MPBu...43..170C Lightcurve