value	quality	siderealorsynodic	author	ref	method
27.7425	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
27.8899	2	Sidereal	Durech	2018A&A...617A..57D	Model
27.8900	3	Synodic	Skiff	LCDB	Lightcurve
27.9200	3	Synodic	Pravec	LCDB	Lightcurve