value	quality	siderealorsynodic	author	ref	method
3.9878	3-	Synodic	Clark	2016MPBu...43....2C	Lightcurve
3.9885	2	Sidereal	Martikainen	2021A&A...649A..98M	Model
3.9885	2	Sidereal	Durech	2018A&A...617A..57D	Model