value	quality	siderealorsynodic	author	ref	method
6.4567	2	Sidereal	Durech	2020A&A...643A..59D	Model
6.4570	3-	Synodic	Casalnuovo	2016MPBu...43..112C	Lightcurve
6.4571	3	Synodic	Hess	2017MPBu...44....3H	Lightcurve
6.4571	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve