value	unc_up	unc_lo	author	ref	method
6.60	0.100	0.100	Hanus	2018Icar..309..297H	RADIOMETRY_TPM
6.62	0.070	0.070	Masiero	2014ApJ...791..121M	NEATM
6.93	0.070	0.070	Masiero	2011ApJ...741...68M	NEATM