value	quality	siderealorsynodic	author	ref	method
19.8090	3	Synodic	Black	2016MPBu...43..287B	Lightcurve
19.8365	2	Sidereal	Durech	2018A&A...617A..57D	Model
19.8367	2	Sidereal	Durech	2019A&A...631A...2D	Model