value	unc_up	unc_lo	author	ref	method
2.6800e+18	1.1800e+18	1.1800e+18	Fienga	2011CeMDA.111..363F	Ephem
6.7668e+17	3.2766e+17	3.2766e+17	Fienga	INPOP19a	Ephem
8.2700e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem