value unc_up unc_lo author ref method 17.16 0.410 0.410 Masiero 2014ApJ...791..121M NEATM 18.06 0.264 0.264 Masiero 2011ApJ...741...68M NEATM 19.69 3.940 3.940 Ali-Lagoa 2018A&A...612A..85A NEATM 20.23 0.870 0.870 Usui 2011PASJ...63.1117U NEATM 21.59 4.320 4.320 Ali-Lagoa 2018A&A...612A..85A NEATM