value	quality	siderealorsynodic	author	ref	method
6.4000	3-	Synodic	Hasegawa	2014PASJ...66...54H	Lightcurve
6.4090	2	Synodic	Erasmus	2020ApJS..247...13E	Lightcurve
6.4100	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
6.4109	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
6.4109	2	Sidereal	Durech	2020A&A...643A..59D	Model
6.4109	2	Sidereal	Durech	2023A&A...675A..24D	Model