NGC 6204

(MWSC 2457; FoF 1186)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 573
Core radius and density 0.5 [pc], 75 [pc-2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 6204 is a very rich, very dense object of 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, young cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Palma et al. (2025)
Part of multiple system G165, along with HSC_2785, HSC_2778, NGC_6134, NGC_6193, Theia_1643 and CWNU_1842.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Richer et al. (2021)
The expected number of WDs is 5.4, 0 WD candidates found, and 0 WD candidates found in the wide search.

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1383, e_all=0.1613.

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=7.576, Av=1.291, [Fe/H]=0.020 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108).

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: one or a few submm emission within the cluster area.

Data
πŸ” Search references for NGC 6204 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 251.542 -47.024 0.811 -0.711 -0.615 4.736
Li et al. 2025 251.538 -47.027 0.805 -0.69 -0.596 –
Wei et al. 2025 251.537 -47.023 0.834 -0.737 -0.609 –
Almeida et al. 2025 251.534 -47.027 – – – –
Hunt & Reffert 2024 251.536 -47.026 0.826 -0.71 -0.614 9.26
Cavallo et al. 2024 251.538 -47.015 0.829 – – –
Hunt & Reffert 2023 251.536 -47.026 0.826 -0.71 -0.614 9.26
Almeida et al. 2023 251.527 -47.029 – – – –
Just et al. 2023 251.524 -47.02 – – – –
He et al. 2022 251.538 -47.024 0.831 -0.736 -0.619 –
Tarricq et al. 2022 251.545 -47.028 0.834 -0.719 -0.628 –
Jaehnig et al. 2021 251.538 -47.028 0.837 -0.717 -0.571 –
Rain et al. 2021 251.538 -47.027 0.805 -0.69 -0.596 –
Richer et al. 2021 251.539 -47.023 0.806 -0.703 -0.565 –
Dias et al. 2021 251.534 -47.027 0.809 -0.687 -0.57 –
Cantat-Gaudin et al. 2020 251.538 -47.027 0.805 -0.69 -0.596 –
SΓ‘nchez et al. 2020 251.537 -47.017 – -0.802 -0.687 –
Cantat-Gaudin & Anders 2020 251.538 -47.027 0.805 -0.69 -0.596 –
Liu & Pang 2019 251.535 -47.025 0.826 -0.682 -0.588 –
Bossini et al. 2019 251.538 -47.027 – – – –
Cantat-Gaudin et al. 2018 251.538 -47.027 0.805 -0.69 -0.596 –
Dib et al. 2018 251.535 -47.02 – – – –
Loktin & Popova 2017 251.535 -47.018 – -3.326 -5.501 -34.9
Sampedro et al. 2017 251.537 -47.017 – -1.66 0.16 –
Joshi et al. 2016 251.535 -47.02 – – – –
Kharchenko et al. 2016 251.524 -47.02 – – – –
Netopil et al. 2016 251.535 -47.02 – – – –
Dias et al. 2014 251.538 -47.017 – -1.58 -0.04 –
Kharchenko et al. 2013 251.535 -47.02 – -2.8 -1.41 -34.9
Morales et al. 2013 251.537 -47.017 – – – –
Gozha et al. 2012 251.537 -47.017 – – – –
Piskunov et al. 2008 251.518 -47.018 – – – –
Kharchenko et al. 2007 251.53 -47.02 – 0.08 – –
Ahumada & Lapasset 2007 251.525 -47.017 – – – –
van den Bergh 2006 251.533 -47.012 – – – –
Kharchenko et al. 2005 251.53 -47.02 – 0.04 -1.45 –
Kharchenko et al. 2003 251.62 -47.02 – -1.04 -3.06 –
Chen et al. 2003 251.643 -47.025 – -0.02 -0.01 -53.0
Dias et al. 2002 251.537 -47.017 – -1.61 -0.05 53.0
Dambis 1999 251.533 -47.012 – – – –
Lynga 1987 251.611 -47.02 – – – -39.0
van den Bergh & Hagen 1975 250.7 -46.933 – – – –
Sulentic et al. 1973 251.612 -47.028 – – – –

πŸ’‘ 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] Bfrac BSS
UCC 99999– 1.14 1.36 1.5 93 -0.140 628 0.5 0
Li et al. 2025 1.17 1.24 – 189 0.246 – – –
Wei et al. 2025 1.91 1.72 – 135 -0.250 798 0.45 –
Almeida et al. 2025 1.14 1.50 – 115 – 753 – –
Hunt & Reffert 2024 1.13 1.40 1.50 80 – 1294(1) – –
Cavallo et al. 2024 1.10 1.87 – 55 -0.310 – – –
Hunt & Reffert 2023 1.13 1.41 1.50 80 – – – –
Almeida et al. 2023 1.13 1.52 – 103 0.070 628(1) 0.55 –
Just et al. 2023 – – – 100 – 53 – –
He et al. 2022 – 1.70 – 40 – – – –
Tarricq et al. 2022 1.20 – – 115 – – – –
Jaehnig et al. 2021 1.19(1) – – – – – – –
Rain et al. 2021 1.20 1.29 – 37 – – – 0
Richer et al. 2021 – 1.48 – 93 – – – –
Dias et al. 2021 1.14 1.50 – 115 0.096 – – –
Cantat-Gaudin et al. 2020 1.24 1.13 – 93 – – – –
Kounkel et al. 2020 1.20 1.51 – 89 – – – –
Cantat-Gaudin & Anders 2020 1.20 – – – – – – –
Liu & Pang 2019 – – – 135 -0.250 – – –
Bossini et al. 2019 1.26 1.29 – 38 0.020 – – –
Cantat-Gaudin et al. 2018 1.20 – – – – – – –
Dib et al. 2018 1.08 – – 100 – – – –
Loktin & Popova 2017 1.09 1.36 – 37 – – – –
Joshi et al. 2016 1.08 1.36 – 100 – 29 – –
Kharchenko et al. 2016 1.08 1.36 – 100 – – – –
Netopil et al. 2016 7.00 – – 110 – – – –
Kharchenko et al. 2013 1.08 1.36 – 100 -1.053 – – –
Morales et al. 2013 1.20 – – 80 – – – –
Gozha et al. 2012 1.20 – – 79 -0.140 29 – –
Paunzen et al. 2010 – – – – -0.140 – – –
Piskunov et al. 2008 1.08 1.36 – 191 – – – –
Ahumada & Lapasset 2007 – 1.36 – 36 – – – 0
van den Bergh 2006 1.08 1.36 – 36 – – – –
Kharchenko et al. 2005 1.08 1.36 – 191 – – – –
Kharchenko et al. 2003 1.08 1.36 – – – – – –
Chen et al. 2003 1.08 – – 30 – – – –
Dias et al. 2002 1.20 1.45 – 79 -1.053 – – –
Dambis 1999 0.86 1.18 – 126 – – – –
Lynga 1987 2.60 1.55 – 13 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
ℹ️
NGC 6204 UCC
NGC 6204 HUNT23
NGC 6204 CANTAT20
Galactocentric position diagram