value quality siderealorsynodic author ref method 12.0000 1 Synodic Hayes 2018MPBu...45..324H Lightcurve 92.4470 2 Sidereal Durech 2018A&A...617A..57D Model 92.4516 2 Sidereal Martikainen 2021A&A...649A..98M Model