value	unc_up	unc_lo	author	ref	method
7.57	nan	nan	Waszczak	2015AJ....150...75W	Lightcurve
7.58	nan	nan	Pal	2020ApJS..247...26P	Lightcurve
7.58	nan	nan	Higgins	2008MPBu...35...30H	Lightcurve
7.59	nan	nan	Durech	2018A&A...617A..57D	Model