value	unc_up	unc_lo	author	ref	method
1.7700e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
2.8880e+18	5.4853e+17	5.4853e+17	Fienga	INPOP19a	Ephem
6.4884e+18	8.7493e+17	8.7493e+17	Fienga	2013arXiv1301.1510F	Ephem