value quality siderealorsynodic author ref method 15.8900 2 Synodic Binzel 1987Icar...72..135B Lightcurve 16.0556 2 Sidereal Martikainen 2021A&A...649A..98M Model 16.0558 2 Sidereal Durech 2018A&A...617A..57D Model 16.0600 3- Synodic Polakis 2018MPBu...45..199P Lightcurve 16.0620 2 Synodic Behrend LCDB Lightcurve