value quality siderealorsynodic author ref method 5.2600 3 Synodic Stephens 2019MPBu...46..180S Lightcurve 5.3238 2 Sidereal Durech 2023A&A...675A..24D Model 5.3240 3- Synodic Hasegawa 2014PASJ...66...54H Lightcurve