value	unc_up	unc_lo	author	ref	method
2.4700e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
3.0800e+18	1.3500e+18	1.3500e+18	Fienga	2011CeMDA.111..363F	Ephem
7.8743e+17	3.8894e+17	3.8894e+17	Fienga	INPOP19a	Ephem