value	quality	siderealorsynodic	author	ref	method
18.2760	3-	Synodic	Ehlert	2015MPBu...42..211E	Lightcurve
18.2770	2	Synodic	Waszczak	2015AJ....150...75W	Lightcurve
18.2852	2	Sidereal	Durech	2020A&A...643A..59D	Model
18.2930	3	Synodic	Marchini	2015MPBu...42..224M	Lightcurve