value quality siderealorsynodic author ref method 7.4669 2 Sidereal Durech 2023A&A...675A..24D Model 7.4670 2 Sidereal Hanus 2013A&A...559A.134H Model 7.5000 3 Synodic Brinsfield 2008MPBu...35..119B Lightcurve