value	unc_up	unc_lo	author	ref	method
18.29	1.240	1.240	Usui	2011PASJ...63.1117U	NEATM
18.82	3.760	3.760	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.85	0.281	0.281	Masiero	2011ApJ...741...68M	NEATM
27.61	2.300	2.300	Tedesco	2002AJ....123.1056T	STM