value quality siderealorsynodic author ref method 4.8360 3 Synodic McNeill 2018AJ....156..282M Lightcurve 4.8394 2 Sidereal Durech 2023A&A...675A..24D Model 4.8400 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve