value quality siderealorsynodic author ref method 4.3593 2 Sidereal Durech 2018A&A...617A..57D Model 4.3593 2 Sidereal Durech 2023A&A...675A..24D Model 4.3606 3 Synodic Behrend LCDB Lightcurve 4.3610 3 Synodic Pravec LCDB Lightcurve