value unc_up unc_lo author ref method 1.74 0.060 0.060 Usui 2011PASJ...63.1117U NEATM 1.80 0.447 0.447 Mainzer 2012ApJ...760L..12M NEATM 2.04 0.200 0.200 Ali-Lagoa 2018A&A...612A..85A NEATM 2.07 0.106 0.106 Mainzer 2012ApJ...760L..12M NEATM