value	unc_up	unc_lo	author	ref	method
18.59	1.310	1.310	Usui	2011PASJ...63.1117U	NEATM
18.96	0.380	0.380	Masiero	2014ApJ...791..121M	NEATM
19.35	3.870	3.870	Ali-Lagoa	2018A&A...612A..85A	NEATM
20.33	0.397	0.397	Masiero	2011ApJ...741...68M	NEATM