value	quality	siderealorsynodic	author	ref	method
18.0387	2	Sidereal	Martikainen	2021A&A...649A..98M	Model
18.0389	2	Sidereal	Durech	2020A&A...643A..59D	Model
18.1450	2+	Synodic	Behrend	LCDB	Lightcurve
18.2630	2+	Synodic	Brinsfield	2010MPBu...37...50B	Lightcurve
36.5160	3	Synodic	Pilcher	2019MPBu...46..267P	Lightcurve