value	quality	siderealorsynodic	author	ref	method
21.0260	2	Synodic	Erasmus	2020ApJS..247...13E	Lightcurve
21.0320	3	Synodic	Slivan	2008Icar..195..226S	Lightcurve
21.0340	2	Synodic	Behrend	LCDB	Lightcurve
21.0500	2	Synodic	Behrend	LCDB	Lightcurve
28.0000	1	Synodic	Binzel	1987Icar...72..135B	Lightcurve