value	quality	siderealorsynodic	author	ref	method
8.9254	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
8.9360	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
8.9700	2	Synodic	Chang	2016ApJS..227...20C	Lightcurve