value	quality	siderealorsynodic	author	ref	method
17.9780	2	Synodic	Gross	2003MPBu...30...44G	Lightcurve
17.9940	2+	Synodic	Behrend	LCDB	Lightcurve
28.9200	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve