value quality siderealorsynodic author ref method 2.2700 Synodic Erasmus 2018ApJS..237...19E Lightcurve 2.2700 2 Synodic Erasmus 2019ApJS..242...15E Lightcurve 9.4398 2 Sidereal Durech 2023A&A...675A..24D Model 9.4500 2 Synodic Chang 2019ApJS..241....6C Lightcurve