value	unc_up	unc_lo	author	ref	method
4.2900e+17	2.6900e+17	2.6900e+17	Fienga	2017NSTIM.108.....V	Ephem
1.2700e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
2.0430e+18	5.3200e+17	5.3200e+17	Fienga	2020MNRAS.492..589F	Ephem
5.0945e+18	1.1334e+18	1.1334e+18	Fienga	2013arXiv1301.1510F	Ephem
5.6500e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem