value	quality	siderealorsynodic	author	ref	method
20.2908	2	Sidereal	Durech	2020A&A...643A..59D	Model
20.2908	2	Sidereal	Durech	2023A&A...675A..24D	Model
20.2912	2	Sidereal	Durech	2018A&A...617A..57D	Model
20.3000	2	Synodic	Behrend	LCDB	Lightcurve