value unc_up unc_lo author ref method 17.69 1.430 1.430 Usui 2011PASJ...63.1117U NEATM 17.75 0.261 0.261 Masiero 2011ApJ...741...68M NEATM 18.21 3.640 3.640 Ali-Lagoa 2018A&A...612A..85A NEATM 20.84 5.730 5.730 Masiero 2021PSJ.....2..162M NEATM 21.45 4.650 4.650 Nugent 2016AJ....152...63N NEATM