value	quality	siderealorsynodic	author	ref	method
3.1581	2	Sidereal	Durech	2018A&A...617A..57D	Model
3.1581	3	Synodic	Franco	2017MPBu...44..185F	Lightcurve
3.1581	3	Synodic	Sada	2018MPBu...45..122S	Lightcurve