value	quality	siderealorsynodic	author	ref	method
56.6430	2	Sidereal	Durech	2023A&A...675A..24D	Model
56.6440	2	Sidereal	Durech	2018A&A...617A..57D	Model
56.6446	2	Sidereal	Martikainen	2021A&A...649A..98M	Model
56.6500	2	Synodic	Behrend	LCDB	Lightcurve
56.8100	2	Synodic	Carbognani	2014MPBu...41....4C	Lightcurve
56.8130	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve