value	unc_up	unc_lo	author	ref	method
1.0980e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
1.9500e+18	7.2800e+17	7.2800e+17	Fienga	2011CeMDA.111..363F	Ephem
8.3398e+17	2.8241e+17	2.8241e+17	Fienga	INPOP19a	Ephem