value quality siderealorsynodic author ref method 7.2510 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 7.2833 2 Sidereal Durech 2023A&A...675A..24D Model 7.3000 3 Synodic Chang 2014ApJ...788...17C Lightcurve