value	unc_up	unc_lo	author	ref	method
1.2488e+18	1.1732e+18	1.1732e+18	Fienga	2013arXiv1301.1510F	Ephem
6.0001e+17	2.7778e+17	2.7778e+17	Fienga	INPOP19a	Ephem
9.7700e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem