value quality siderealorsynodic author ref method 22.9050 2 Sidereal Durech 2023A&A...675A..24D Model 22.9140 3 Synodic Pilcher 2012MPBu...39...11P Lightcurve 22.9560 2 Synodic Pal 2020ApJS..247...26P Lightcurve