value	unc_up	unc_lo	author	ref	method
8.6000e+17	3.8700e+17	3.8700e+17	Fienga	2020MNRAS.492..589F	Ephem
1.0956e+18	1.8692e+18	1.8692e+18	Fienga	2013arXiv1301.1510F	Ephem
5.1100e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem