value	quality	siderealorsynodic	author	ref	method
18.6920	3	Synodic	Ditteon	2018MPBu...45..117D	Lightcurve
18.6975	2	Sidereal	Durech	2020A&A...643A..59D	Model
19.6100	2	Synodic	Behrend	LCDB	Lightcurve