value	unc_up	unc_lo	author	ref	method
2.1500e+19	2.4400e+19	2.4400e+19	Zielenbach	2011AJ....142..120Z	Deflec
3.1000e+19	2.5500e+19	2.5500e+19	Zielenbach	2011AJ....142..120Z	Deflec
5.4319e+18	2.4521e+18	2.4521e+18	Fienga	INPOP19a	Ephem
7.3800e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem