value quality siderealorsynodic author ref method 6.0840 3 Synodic Simpson 2013MPBu...40..146S Lightcurve 6.0870 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 6.0881 2 Sidereal Durech 2020A&A...643A..59D Model