value	unc_up	unc_lo	author	ref	method
1.2670e+18	5.7500e+17	5.7500e+17	Fienga	2020MNRAS.492..589F	Ephem
2.0163e+18	7.3573e+17	7.3573e+17	Fienga	2013arXiv1301.1510F	Ephem
2.2700e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem