value	unc_up	unc_lo	author	ref	method
49.80	2.400	2.400	Fernandez	2003AJ....126.1563F	RADIOMETRY_STM
50.01	0.820	0.820	Grav	2011ApJ...742...40G	NEATM
52.06	0.510	0.510	Grav	2012ApJ...759...49G	NEATM
58.80	2.800	2.800	Fernandez	2003AJ....126.1563F	RADIOMETRY_STM