value	unc_up	unc_lo	author	ref	method
1.8000e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
7.2986e+17	3.3709e+17	3.3709e+17	Fienga	INPOP19a	Ephem
7.8300e+18	1.5000e+18	1.5000e+18	Fienga	2011CeMDA.111..363F	Ephem
8.2979e+18	1.1533e+18	1.1533e+18	Fienga	2013arXiv1301.1510F	Ephem