value	quality	siderealorsynodic	author	ref	method
15.0000	1+	Synodic	Behrend	LCDB	Lightcurve
16.1960	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
17.3000	2	Synodic	Brinsfield	2009MPBu...36...64B	Lightcurve