value quality siderealorsynodic author ref method 7.7220 2- Synodic McNeill 2019ApJS..245...29M Lightcurve 7.7256 2 Sidereal Durech 2020A&A...643A..59D Model 7.7256 2 Sidereal Durech 2023A&A...675A..24D Model 7.7263 2 Synodic Pal 2020ApJS..247...26P Lightcurve