value	unc_up	unc_lo	author	ref	method
6.62	0.224	0.224	Masiero	2011ApJ...741...68M	NEATM
6.67	2.182	2.182	Masiero	2017AJ....154..168M	NEATM
7.38	1.690	1.690	Nugent	2016AJ....152...63N	NEATM