value quality siderealorsynodic author ref method 12.1254 2 Sidereal Durech 2020A&A...643A..59D Model 12.1256 2 Sidereal Durech 2023A&A...675A..24D Model 12.1410 2+ Synodic Moravec 2012MPBu...39..213M Lightcurve