value	unc_up	unc_lo	author	ref	method
1.8500e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
6.5900e+17	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
8.5128e+17	4.0428e+17	4.0428e+17	Fienga	INPOP19a	Ephem