value	quality	siderealorsynodic	author	ref	method
31.3265	2	Synodic	Pal	2020ApJS..247...26P	Lightcurve
31.3292	2	Sidereal	Durech	2020A&A...643A..59D	Model
31.3580	2	Synodic	McNeill	2019ApJS..245...29M	Lightcurve
31.3620	2	Synodic	Erasmus	2020ApJS..247...13E	Lightcurve
31.4000	3-	Synodic	Stephens	2006MPBu...33...56S	Lightcurve