value quality siderealorsynodic author ref method 5.8100 3 Synodic Chang 2014ApJ...788...17C Lightcurve 5.8240 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 5.8241 2 Sidereal Durech 2020A&A...643A..59D Model