value	quality	siderealorsynodic	author	ref	method
6.9579	2	Sidereal	Durech	2023A&A...675A..24D	Model
6.9640	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
6.9640	3	Synodic	Bembrick	2002MPBu...29....1B	Lightcurve