value	unc_up	unc_lo	author	ref	method
1.6930e+18	4.6300e+17	4.6300e+17	Fienga	2020MNRAS.492..589F	Ephem
1.7100e+18	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
3.6000e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
3.8180e+18	6.2700e+17	6.2700e+17	Fienga	2017NSTIM.108.....V	Ephem
4.0500e+18	8.3100e+17	8.3100e+17	Fienga	2011CeMDA.111..363F	Ephem