value	unc_up	unc_lo	author	ref	method
1.1200e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
3.2400e+18	1.3000e+18	1.3000e+18	Fienga	2011CeMDA.111..363F	Ephem
4.8942e+17	2.3662e+17	2.3662e+17	Fienga	INPOP19a	Ephem