value quality siderealorsynodic author ref method 7.2200 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 7.2327 2 Sidereal Durech 2020A&A...643A..59D Model 7.2380 3 Synodic Sauppe 2007MPBu...34..119S Lightcurve