value quality siderealorsynodic author ref method 17.2000 2 Synodic Sarneczky 1999A&AS..137..363S Lightcurve 41.6910 2 Sidereal Durech 2023A&A...675A..24D Model 41.6922 2 Sidereal Durech 2018A&A...617A..57D Model