value quality siderealorsynodic author ref method 4.3440 3 Synodic Clark 2007MPBu...34...19C Lightcurve 4.3447 2 Sidereal Durech 2020A&A...643A..59D Model 4.3450 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve