value quality siderealorsynodic author ref method 8.5626 3 Synodic Oey 2016MPBu...43...45O Lightcurve 8.5630 3 Synodic Pravec LCDB Lightcurve 8.5645 2 Sidereal Martikainen 2021A&A...649A..98M Model 8.5646 2 Sidereal Durech 2018A&A...617A..57D Model