value	quality	siderealorsynodic	author	ref	method
2.8990	2	Synodic	Behrend	LCDB	Lightcurve
2.8990	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
2.9000	2	Synodic	Yeh	2020AJ....160...73Y	Lightcurve