value	unc_up	unc_lo	author	ref	method
1.2450e+18	5.3300e+17	5.3300e+17	Fienga	2020MNRAS.492..589F	Ephem
1.5300e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
3.8000e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
5.9654e+15	nan	nan	Fienga	2013arXiv1301.1510F	Ephem
9.6900e+17	2.8000e+17	2.8000e+17	Fienga	2014arXiv1405.0484F	Ephem