value	quality	siderealorsynodic	author	ref	method
18.1720	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
18.1769	2	Sidereal	Durech	2019A&A...631A...2D	Model
18.1770	2	Sidereal	Durech	2018A&A...620A..91D	Model