value	unc_up	unc_lo	author	ref	method
2.0300e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
7.3860e+18	2.5110e+18	2.5110e+18	Fienga	2020MNRAS.492..589F	Ephem
8.6100e+17	5.0000e+18	5.0000e+18	Zielenbach	2011AJ....142..120Z	Deflec