NGC 6231
- CN 1.0 Very rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
NGC 6231 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane. It is catalogued as a massive, near-solar metallicity, very young cluster (see Parameters). It is very well-studied in the literature. Note: This object shares a very small percentage of members with 2 later reported entries. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | – | 253.556 | -41.828 | 0.605 | -0.576 | -2.179 | -27.671 |
| Almeida et al. | 2025 | 253.535 | -41.801 | – | – | – | – |
| Hunt & Reffert | 2024 | 253.571 | -41.836 | 0.608 | -0.576 | -2.184 | -30.795 |
| Celli et al. | 2024 | 253.545 | -41.812 | – | – | – | – |
| Cavallo et al. | 2024 | 253.56 | -41.828 | 0.607 | – | – | – |
| Hunt & Reffert | 2023 | 253.571 | -41.836 | 0.608 | -0.576 | -2.184 | -30.795 |
| Jaehnig et al. | 2021 | 253.544 | -41.803 | 0.621 | -0.578 | -2.096 | – |
| Rain et al. | 2021 | 253.545 | -41.812 | 0.589 | -0.529 | -2.177 | – |
| Dias et al. | 2021 | 253.535 | -41.801 | 0.598 | -0.533 | -2.162 | -28.186 |
| Cantat-Gaudin et al. | 2020 | 253.545 | -41.812 | 0.589 | -0.529 | -2.177 | – |
| Dias et al. | 2019 | 253.542 | -41.825 | 0.591 | -0.569 | -2.164 | -28.47 |
| Soubiran et al. | 2018 | 253.545 | -41.812 | – | – | – | -39.88 |
| Cantat-Gaudin et al. | 2018 | 253.545 | -41.812 | 0.589 | -0.529 | -2.177 | – |
| Loktin & Popova | 2017 | 253.545 | -41.825 | – | -0.707 | -0.283 | -28.5 |
| Piskunov et al. | 2008 | 253.542 | -41.831 | – | – | – | – |
| Kharchenko et al. | 2007 | 253.54 | -41.83 | – | 0.22 | – | -27.28 |
| Kharchenko et al. | 2005 | 253.56 | -41.83 | – | -0.39 | -1.99 | -27.28 |
| Kharchenko et al. | 2003 | 253.56 | -41.83 | – | -1.45 | -0.96 | – |
| Chen et al. | 2003 | 253.555 | -41.787 | – | -0.34 | -2.32 | -25.0 |
| Dias et al. | 2002 | 253.542 | -41.825 | – | -0.89 | -1.79 | -27.54 |
| Dambis | 1999 | 253.535 | -41.827 | – | – | – | – |
💡 Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. | 2025 | 1.43 | 1.53 | – | 9 | – | 3080 | – | – |
| Hunt & Reffert | 2024 | – | – | – | – | – | 4210* | – | – |
| Celli et al. | 2024 | – | – | – | 14 | – | 3199 | – | – |
| Cavallo et al. | 2024 | 1.31 | 1.48 | – | 9 | 0.050 | – | – | – |
| Hunt & Reffert | 2023 | 1.56 | 1.53 | 1.69 | 4 | – | – | – | – |
| Jaehnig et al. | 2021 | 1.64* | – | – | – | – | – | – | – |
| Rain et al. | 2021 | 1.62 | 1.33 | – | 7 | – | – | – | 0 |
| Dias et al. | 2021 | 1.43 | 1.53 | – | 9 | 0.110 | – | – | – |
| Cantat-Gaudin et al. | 2020 | 1.47 | 1.07 | – | 14 | – | – | – | – |
| Dias et al. | 2019 | 0.99 | 1.55 | – | 12 | -1.623 | – | – | – |
| Soubiran et al. | 2018 | 1.62 | – | – | – | – | – | – | – |
| Cantat-Gaudin et al. | 2018 | 1.62 | – | – | – | – | – | – | – |
| Loktin & Popova | 2017 | 1.25 | 1.35 | – | 7 | – | – | – | – |
| Piskunov et al. | 2008 | 1.25 | 1.36 | – | 6 | – | – | – | – |
| Kharchenko et al. | 2005 | 1.25 | 1.36 | – | 6 | – | – | – | – |
| Kharchenko et al. | 2003 | 1.24 | 1.36 | – | – | – | – | – | – |
| Chen et al. | 2003 | 1.24 | – | – | 0 | – | – | – | – |
| Dias et al. | 2002 | 1.24 | 1.36 | – | 7 | – | – | – | – |
| Dambis | 1999 | 1.41 | 1.45 | – | 3 | – | – | – | – |
💡 Note: The parameters are sometimes
transformed from their original values to match the format of the
columns shown here, see FAQ.
The columns DAv, Bfr, BSS correspond to differential
extinction, binary fraction, and blue stragglers, respectively.
BSS values can be listed as fractions or integers.
(*): indicates that this parameter is
assigned more than one value in the corresponding reference.
