value quality siderealorsynodic author ref method 16.9600 2+ Synodic Brines 2017MPBu...44..145B Lightcurve 22.2459 2 Sidereal Durech 2018A&A...617A..57D Model 22.2460 2 Sidereal Martikainen 2021A&A...649A..98M Model 22.2500 2 Synodic Durkee 2018MPBu...45..333D Lightcurve 22.3167 2 Synodic Pal 2020ApJS..247...26P Lightcurve