value	quality	siderealorsynodic	author	ref	method
6.8160	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
6.8190	3	Synodic	Behrend	LCDB	Lightcurve
6.8207	2	Sidereal	Durech	2016A&A...587A..48D	Model
6.8207	2	Sidereal	Durech	2023A&A...675A..24D	Model
6.8210	3-	Synodic	Bennefeld	2009MPBu...36...45B	Lightcurve