value	unc_up	unc_lo	author	ref	method
0.56	0.090	0.230	Wolters	2008Icar..193..535W	RADIOMETRY_STM
0.62	0.090	0.250	Wolters	2008Icar..193..535W	RADIOMETRY_STM
0.80	nan	nan	Pravec	2006Icar..181...63P	RADAR