value quality siderealorsynodic author ref method 8.0230 2+ Synodic Hess 2016MPBu...43..120H Lightcurve 9.6289 2 Sidereal Durech 2020A&A...643A..59D Model 9.6290 2 Sidereal Durech 2023A&A...675A..24D Model 9.6297 3 Synodic Behrend LCDB Lightcurve