value	quality	siderealorsynodic	author	ref	method
18.8540	3	Synodic	Molnar	2008MPBu...35...82M	Lightcurve
18.8800	2-	Synodic	Melita	2010P&SS...58.1035M	Lightcurve
18.9170	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve