value quality siderealorsynodic author ref method 5.4000 Synodic Erasmus 2019ApJS..242...15E Lightcurve 60.4520 2 Sidereal Durech 2019A&A...631A...2D Model 60.4670 2 Sidereal Durech 2023A&A...675A..24D Model 60.4800 2 Sidereal Durech 2018A&A...620A..91D Model