value	unc_up	unc_lo	author	ref	method
9.6400e+17	4.3000e+17	4.3000e+17	Fienga	2020MNRAS.492..589F	Ephem
1.1700e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
6.4000e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem