value	unc_up	unc_lo	author	ref	method
2.3842e+16	6.9684e+15	6.9684e+15	Fienga	INPOP19a	Ephem
6.6600e+15	nan	nan	Folkner	2014IPNPR.196C...1F	Ephem
6.6900e+15	2.9800e+12	2.9800e+12	Yeomans	2000Sci...289.2085Y	FlyBy