NGC 6561
(MWSC 2834)
0.95
UTI
0.75
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Radius (P>50% members)
3.3 [arcmin]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
NGC 6561 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is very well-studied in the literature.
Relatively close
Moderate extinction
Near-solar metallicity
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | β | 272.65 | -16.733 | 0.673 | -0.009 | -0.78 | -11.67 |
| Li et al. | 2025 | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | β |
| Almeida et al. | 2025 | 272.681 | -16.741 | β | β | β | β |
| Hunt & Reffert | 2024 | 272.645 | -16.731 | 0.671 | -0.003 | -0.794 | -35.442 |
| Celli et al. | 2024 | 272.659 | -16.74 | β | β | β | β |
| Cavallo et al. | 2024 | 272.651 | -16.733 | 0.672 | β | β | β |
| Hunt & Reffert | 2023 | 272.645 | -16.731 | 0.671 | -0.003 | -0.794 | -35.442 |
| Just et al. | 2023 | 272.605 | -16.731 | β | β | β | β |
| Dias et al. | 2021 | 272.681 | -16.741 | 0.659 | -0.006 | -0.748 | β |
| Cantat-Gaudin et al. | 2020 | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | β |
| SΓ‘nchez et al. | 2020 | 272.625 | -16.725 | β | -1.159 | -1.731 | β |
| Cantat-Gaudin & Anders | 2020 | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | β |
| Soubiran et al. | 2018 | 272.659 | -16.74 | β | β | β | 1.62 |
| Cantat-Gaudin et al. | 2018 | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | β |
| Kharchenko et al. | 2016 | 272.605 | -16.731 | β | β | β | β |
| Dias et al. | 2014 | 272.625 | -16.725 | β | -0.04 | -2.11 | β |
| Kharchenko et al. | 2013 | 272.613 | -16.73 | β | 0.4 | -1.5 | -17.9 |
| Gozha et al. | 2012 | 272.625 | -16.725 | β | β | β | β |
| Piskunov et al. | 2008 | 272.617 | -16.736 | β | β | β | β |
| Kharchenko et al. | 2007 | 272.62 | -16.73 | β | 0.18 | β | -17.93 |
| Kharchenko et al. | 2005 | 272.62 | -16.73 | β | 0.02 | 0.02 | -17.93 |
π‘ 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 |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.16 | 1.38 | β | 15 | -0.257 | β | β | β |
| Almeida et al. | 2025 | 1.46 | 1.39 | β | 17 | β | 266 | β | β |
| Hunt & Reffert | 2024 | β | β | β | β | β | 412* | β | β |
| Celli et al. | 2024 | β | β | β | 19 | β | 298 | β | β |
| Cavallo et al. | 2024 | 1.18 | 1.55 | β | 18 | -0.420 | β | β | β |
| Hunt & Reffert | 2023 | 1.39 | 1.21 | 1.25 | 14 | β | β | β | β |
| Just et al. | 2023 | β | β | β | 4 | β | 454 | β | β |
| Dias et al. | 2021 | 1.46 | 1.39 | β | 17 | 0.328 | β | β | β |
| Cantat-Gaudin et al. | 2020 | 1.48 | 0.95 | β | 19 | β | β | β | β |
| Cantat-Gaudin & Anders | 2020 | 1.46 | β | β | β | β | β | β | β |
| Soubiran et al. | 2018 | 1.46 | β | β | β | β | β | β | β |
| Cantat-Gaudin et al. | 2018 | 1.46 | β | β | β | β | β | β | β |
| Kharchenko et al. | 2016 | 2.49 | 2.13 | β | 4 | β | β | β | β |
| Kharchenko et al. | 2013 | 2.49 | 2.13 | β | 4 | β | β | β | β |
| Gozha et al. | 2012 | 3.40 | β | β | 8 | β | 16596 | β | β |
| Piskunov et al. | 2008 | 3.40 | 1.24 | β | 8 | β | β | β | β |
| Kharchenko et al. | 2005 | 3.40 | 1.24 | β | 8 | β | β | β | β |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver sample.
Cavallo et al. (2024)
Gold sample.