value	unc_up	unc_lo	author	ref	method
2.0457e+18	9.2439e+17	9.2439e+17	Fienga	INPOP19a	Ephem
2.1700e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
4.5300e+18	1.7600e+18	1.7600e+18	Fienga	2011CeMDA.111..363F	Ephem
7.9539e+15	nan	nan	Fienga	2013arXiv1301.1510F	Ephem