value quality siderealorsynodic author ref method 28.8000 2 Synodic Pravec LCDB Lightcurve 29.0875 2 Sidereal Durech 2020A&A...643A..59D Model 29.1900 3- Synodic Ditteon 2018MPBu...45...13D Lightcurve 31.0000 2 Synodic Binzel 1987Icar...72..135B Lightcurve