value unc_up unc_lo author ref method 18.73 1.870 1.870 Ali-Lagoa 2018A&A...612A..85A NEATM 19.27 0.343 0.343 Masiero 2011ApJ...741...68M NEATM 19.29 0.510 0.510 Usui 2011PASJ...63.1117U NEATM