value	unc_up	unc_lo	author	ref	method
3.1500e+17	nan	nan	Folkner	2009IPNPR.178C...1F	Ephem
3.4200e+17	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
8.3978e+16	4.1562e+16	4.1562e+16	Fienga	INPOP19a	Ephem