value quality siderealorsynodic author ref method 22.8760 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 22.9310 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve 22.9360 2 Sidereal Durech 2023A&A...675A..24D Model