value quality siderealorsynodic author ref method 4.9620 3 Synodic Pilcher 2022MPBu...49..185P Lightcurve 4.9633 3 Synodic Behrend LCDB Lightcurve 4.9633 2 Sidereal Durech 2019A&A...631A...2D Model 4.9634 2 Sidereal Durech 2023A&A...675A..24D Model