value	unc_up	unc_lo	author	ref	method
1.1790e+18	4.3900e+17	4.3900e+17	Fienga	2020MNRAS.492..589F	Ephem
1.6000e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
1.6900e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
2.7300e+18	8.1600e+17	8.1600e+17	Fienga	2009A&A...507.1675F	Ephem