value quality siderealorsynodic author ref method 5.5530 3 Synodic Stephens 2020MPBu...47..125S Lightcurve 5.5542 2 Sidereal Durech 2023A&A...675A..24D Model 5.5542 2 Sidereal Durech 2020A&A...643A..59D Model 5.5560 3 Synodic Stephens 2016MPBu...43...52S Lightcurve 6.0000 2 Synodic Behrend LCDB Lightcurve