value	quality	siderealorsynodic	author	ref	method
18.2228	2	Sidereal	Durech	2023A&A...675A..24D	Model
18.2310	3	Synodic	Franco	2016MPBu...43..203F	Lightcurve
18.2800	2	Synodic	Behrend	LCDB	Lightcurve