value	unc_up	unc_lo	author	ref	method
19.94	1.400	1.400	Tedesco	2002AJ....123.1056T	STM
21.29	1.180	1.180	Usui	2011PASJ...63.1117U	NEATM
21.36	4.270	4.270	Ali-Lagoa	2018A&A...612A..85A	NEATM