value quality siderealorsynodic author ref method 136.4000 3- Synodic Alvarez 2013MPBu...40...29A Lightcurve 137.6600 2 Sidereal Durech 2023A&A...675A..24D Model 137.6770 2 Sidereal Durech 2019A&A...631A...2D Model