value	unc_up	unc_lo	author	ref	method
2.1700e+18	8.5500e+17	8.5500e+17	Baer	2008DPS....40.5209B	Deflec
3.7200e+18	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
5.8800e+18	2.0900e+18	2.0900e+18	Fienga	2011CeMDA.111..363F	Ephem
9.7036e+17	4.7342e+17	4.7342e+17	Fienga	INPOP19a	Ephem