value	quality	siderealorsynodic	author	ref	method
6.3930	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
6.3950	3	Synodic	Behrend	LCDB	Lightcurve
6.3970	3	Synodic	Stephens	2020MPBu...47..125S	Lightcurve
6.4000	2	Synodic	Chang	2015ApJS..219...27C	Lightcurve
6.4000	3	Synodic	Stephens	2017MPBu...44..120S	Lightcurve