value quality siderealorsynodic author ref method 16.5980 3- Synodic Yankov 2009MPBu...36....3Y Lightcurve 17.7103 2 Sidereal Durech 2020A&A...643A..59D Model 17.7105 2 Sidereal Durech 2023A&A...675A..24D Model 17.7190 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve