value	unc_up	unc_lo	author	ref	method
2.2280e+18	9.1900e+17	9.1900e+17	Fienga	2020MNRAS.492..589F	Ephem
3.5400e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
6.2700e+18	2.4200e+18	2.4200e+18	Fienga	2011CeMDA.111..363F	Ephem