value quality siderealorsynodic author ref method 5.8857 2 Sidereal Durech 2020A&A...643A..59D Model 5.8857 2 Sidereal Durech 2023A&A...675A..24D Model 5.8860 3 Synodic Pravec LCDB Lightcurve 5.8864 3- Synodic Schmidt 2016MPBu...43..129S Lightcurve