value	unc_up	unc_lo	author	ref	method
20.46	1.720	1.720	Usui	2011PASJ...63.1117U	NEATM
21.06	0.420	0.420	Grav	2012ApJ...744..197G	NEATM
21.10	4.220	4.220	Ali-Lagoa	2018A&A...612A..85A	NEATM