value	unc_up	unc_lo	author	ref	method
6.35	1.420	1.420	Nugent	2016AJ....152...63N	NEATM
6.65	0.298	0.298	Masiero	2011ApJ...741...68M	NEATM
6.72	1.570	1.570	Masiero	2021PSJ.....2..162M	NEATM