value unc_up unc_lo author ref method 18.45 0.242 0.242 Masiero 2011ApJ...741...68M NEATM 18.60 0.220 0.220 Masiero 2014ApJ...791..121M NEATM 20.00 4.000 4.000 Ali-Lagoa 2018A&A...612A..85A NEATM 20.44 0.630 0.630 Usui 2011PASJ...63.1117U NEATM 20.98 4.200 4.200 Ali-Lagoa 2018A&A...612A..85A NEATM 21.04 1.460 1.460 Masiero 2012ApJ...759L...8M NEATM 21.88 4.380 4.380 Ali-Lagoa 2018A&A...612A..85A NEATM