value	unc_up	unc_lo	author	ref	method
3.3520e+18	1.2060e+18	1.2060e+18	Fienga	2020MNRAS.492..589F	Ephem
3.3500e+18	5.4000e+17	5.4000e+17	Marchis	2013Icar..224..178M	BinImg
3.8000e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem