value	quality	siderealorsynodic	author	ref	method
18.8200	2-	Synodic	Chang	2016ApJS..227...20C	Lightcurve
18.8279	2	Sidereal	Durech	2023A&A...675A..24D	Model
18.8339	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
18.8590	2	Synodic	McNeill	2019ApJS..245...29M	Lightcurve