value	quality	siderealorsynodic	author	ref	method
6.6338	3	Synodic	Pravec	LCDB	Lightcurve
6.6346	2	Sidereal	Durech	2018A&A...617A..57D	Model
6.6347	2	Sidereal	Durech	2020A&A...643A..59D	Model
6.6347	2	Sidereal	Durech	2023A&A...675A..24D	Model
6.6400	2	Synodic	Yeh	2020AJ....160...73Y	Lightcurve