value	quality	siderealorsynodic	author	ref	method
6.4400	2	Synodic	Chang	2016ApJS..227...20C	Lightcurve
6.4875	2	Sidereal	Durech	2020A&A...643A..59D	Model
6.4880	3	Synodic	Koff	2002MPBu...29...25K	Lightcurve