value	unc_up	unc_lo	author	ref	method
2.8700e+17	1.3800e+17	1.3800e+17	Fienga	2017NSTIM.108.....V	Ephem
1.5700e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
2.5058e+18	5.8041e+17	5.8041e+17	Fienga	INPOP19a	Ephem
5.6900e+18	7.8200e+17	7.8200e+17	Fienga	2014arXiv1405.0484F	Ephem
6.3200e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem