value	unc_up	unc_lo	author	ref	method
18.66	0.410	0.410	Masiero	2014ApJ...791..121M	NEATM
19.21	0.211	0.211	Masiero	2011ApJ...741...68M	NEATM
26.32	2.600	2.600	Tedesco	2002AJ....123.1056T	STM