value quality siderealorsynodic author ref method 10.1505 3- Synodic Galad 2009MPBu...36..116G Lightcurve 10.1516 2 Sidereal Durech 2023A&A...675A..24D Model 10.1517 2 Sidereal Durech 2019A&A...631A...2D Model 10.1530 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve