value	quality	siderealorsynodic	author	ref	method
8.9686	3-	Synodic	Folberth	2012MPBu...39...51F	Lightcurve
9.0045	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
9.0065	2	Sidereal	Durech	2016A&A...587A..48D	Model
9.0065	2	Sidereal	Durech	2023A&A...675A..24D	Model