value quality siderealorsynodic author ref method 5.3956 2 Synodic Pal 2020ApJS..247...26P Lightcurve 5.3956 2 Sidereal Durech 2020A&A...643A..59D Model 5.4230 2 Synodic Polakis 2021MPBu...48..239P Lightcurve