True distance moduli (column 1), and distance estimates (column 2), for NGC 6981 as found from an extensive literature search.
| μ0 (mag) | Distance (kpc) | Reference | Method |
| 16.117 ± 0.047 | 16.73 ± 0.36 | This paper | Fourier light-curve decomposition of the RR0 stars |
| 16.111 ± 0.047 | 16.68 ± 0.36 | This paper | Fourier light-curve decomposition of the RR1 stars |
| 16.42 ± 0.01 | 19.23 ± 0.09 | Cassisi, De Santis & Piersimoni (2001) | Magnitude of the zero-age horizontal branch |
| 16.52 | 20.14 | Zoccali & Piotto (2000) | Globular cluster luminosity function |
| 16.08 | 16.44 | Ferraro et al. (1999) | Magnitude of the zero-age horizontal branch |
| – | 17.0 | Harris (1996) | Globular cluster cataloguea |
| 16.30 ± 0.05 | 18.20 ± 0.42 | Jimenez et al. (1996) | CMD analysis |
| – | 16.4 | Zinn (1980) | Q39 spectral index |
| 16.29 | 18.1 | Searle & Zinn (1978) | Spectral indices |
| 16.30 | 18.2 | Woltjer (1975) | Mean magnitude of the RR Lyrae stars |
| 15.73 | 14.0 | Dickens & Flinn (1972) | Mean magnitude of the RR Lyrae stars |
| 17.0 | 25 | Kron & Mayall (1960) | Mean magnitude of the RR Lyrae stars |
| μ0 (mag) | Distance (kpc) | Reference | Method |
| 16.117 ± 0.047 | 16.73 ± 0.36 | This paper | Fourier light-curve decomposition of the RR0 stars |
| 16.111 ± 0.047 | 16.68 ± 0.36 | This paper | Fourier light-curve decomposition of the RR1 stars |
| 16.42 ± 0.01 | 19.23 ± 0.09 | Cassisi, De Santis & Piersimoni (2001) | Magnitude of the zero-age horizontal branch |
| 16.52 | 20.14 | Zoccali & Piotto (2000) | Globular cluster luminosity function |
| 16.08 | 16.44 | Ferraro et al. (1999) | Magnitude of the zero-age horizontal branch |
| – | 17.0 | Harris (1996) | Globular cluster cataloguea |
| 16.30 ± 0.05 | 18.20 ± 0.42 | Jimenez et al. (1996) | CMD analysis |
| – | 16.4 | Zinn (1980) | Q39 spectral index |
| 16.29 | 18.1 | Searle & Zinn (1978) | Spectral indices |
| 16.30 | 18.2 | Woltjer (1975) | Mean magnitude of the RR Lyrae stars |
| 15.73 | 14.0 | Dickens & Flinn (1972) | Mean magnitude of the RR Lyrae stars |
| 17.0 | 25 | Kron & Mayall (1960) | Mean magnitude of the RR Lyrae stars |
a The catalogue version used is the updated 2003 version available at http://www.physics.mcmaster.ca/Globular.html.
True distance moduli (column 1), and distance estimates (column 2), for NGC 6981 as found from an extensive literature search.
| μ0 (mag) | Distance (kpc) | Reference | Method |
| 16.117 ± 0.047 | 16.73 ± 0.36 | This paper | Fourier light-curve decomposition of the RR0 stars |
| 16.111 ± 0.047 | 16.68 ± 0.36 | This paper | Fourier light-curve decomposition of the RR1 stars |
| 16.42 ± 0.01 | 19.23 ± 0.09 | Cassisi, De Santis & Piersimoni (2001) | Magnitude of the zero-age horizontal branch |
| 16.52 | 20.14 | Zoccali & Piotto (2000) | Globular cluster luminosity function |
| 16.08 | 16.44 | Ferraro et al. (1999) | Magnitude of the zero-age horizontal branch |
| – | 17.0 | Harris (1996) | Globular cluster cataloguea |
| 16.30 ± 0.05 | 18.20 ± 0.42 | Jimenez et al. (1996) | CMD analysis |
| – | 16.4 | Zinn (1980) | Q39 spectral index |
| 16.29 | 18.1 | Searle & Zinn (1978) | Spectral indices |
| 16.30 | 18.2 | Woltjer (1975) | Mean magnitude of the RR Lyrae stars |
| 15.73 | 14.0 | Dickens & Flinn (1972) | Mean magnitude of the RR Lyrae stars |
| 17.0 | 25 | Kron & Mayall (1960) | Mean magnitude of the RR Lyrae stars |
| μ0 (mag) | Distance (kpc) | Reference | Method |
| 16.117 ± 0.047 | 16.73 ± 0.36 | This paper | Fourier light-curve decomposition of the RR0 stars |
| 16.111 ± 0.047 | 16.68 ± 0.36 | This paper | Fourier light-curve decomposition of the RR1 stars |
| 16.42 ± 0.01 | 19.23 ± 0.09 | Cassisi, De Santis & Piersimoni (2001) | Magnitude of the zero-age horizontal branch |
| 16.52 | 20.14 | Zoccali & Piotto (2000) | Globular cluster luminosity function |
| 16.08 | 16.44 | Ferraro et al. (1999) | Magnitude of the zero-age horizontal branch |
| – | 17.0 | Harris (1996) | Globular cluster cataloguea |
| 16.30 ± 0.05 | 18.20 ± 0.42 | Jimenez et al. (1996) | CMD analysis |
| – | 16.4 | Zinn (1980) | Q39 spectral index |
| 16.29 | 18.1 | Searle & Zinn (1978) | Spectral indices |
| 16.30 | 18.2 | Woltjer (1975) | Mean magnitude of the RR Lyrae stars |
| 15.73 | 14.0 | Dickens & Flinn (1972) | Mean magnitude of the RR Lyrae stars |
| 17.0 | 25 | Kron & Mayall (1960) | Mean magnitude of the RR Lyrae stars |
a The catalogue version used is the updated 2003 version available at http://www.physics.mcmaster.ca/Globular.html.
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