value	unc_up	unc_lo	author	ref	method
5.3400e+17	2.6300e+17	2.6300e+17	Fienga	2020MNRAS.492..589F	Ephem
2.3300e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
4.9400e+17	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem