value quality siderealorsynodic author ref method 5.6260 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.6270 3- Synodic Polakis 2020MPBu...47..314P Lightcurve 5.6303 2 Sidereal Durech 2018A&A...617A..57D Model