value	unc_up	unc_lo	author	ref	method
1.4376e+18	6.2358e+17	6.2358e+17	Fienga	INPOP19a	Ephem
1.8600e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
4.3300e+18	1.0900e+18	1.0900e+18	Fienga	2011CeMDA.111..363F	Ephem