Melotte 223

(Collinder 403; NGC 6819; MWSC 3155; OCL 155; FSR 0202; FoF 628)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 2007
Stellar density (N50/rad) 143.4 [N/pc2]
C3 classification AA
  • 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
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Melotte 223 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a very massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

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

Cavallo et al. (2024)
Gold sample.

Rain et al. (2024)
The BSS population splits into two luminosity groups. Brighter BSSs are reproduced by binary evolution with higher-mass donors, while fainter ones follow lower-mass donor tracks. Overall agreement between models and observations is excellent, with some BSSs nearing MS turnoff.

Data
πŸ” Search references for Melotte 223 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 295.327 40.191 0.373 -2.894 -3.864 2.992
Nizovkina et al. 2025 295.322 40.19 – – – –
Li et al. 2025 295.327 40.19 0.356 -2.916 -3.856 –
Hu & Soubiran 2025 295.326 40.192 – – – –
Wei et al. 2025 295.325 40.192 0.376 -2.893 -3.87 –
Carrasco-Varela et al. 2025 295.494 40.214 – – – –
Almeida et al. 2025 295.329 40.19 – – – –
Zhang et al. 2024 295.322 40.19 – – – –
Hunt & Reffert 2024 295.322 40.19 0.376 -2.9 -3.87 2.969
Cavallo et al. 2024 295.326 40.192 0.376 – – –
Rain et al. 2024 295.328 40.19 0.373 -2.894 -3.869 –
Hunt & Reffert 2023 295.322 40.19 0.376 -2.9 -3.87 2.969
Cordoni et al. 2023 295.329 40.19 0.357 -2.913 -3.856 –
Just et al. 2023 295.316 40.193 – – – –
Jaehnig et al. 2021 295.324 40.192 0.384 -2.916 -3.858 –
Rain et al. 2021 295.327 40.19 0.356 -2.916 -3.856 –
Dias et al. 2021 295.329 40.19 0.357 -2.913 -3.856 3.376
Cantat-Gaudin et al. 2020 295.327 40.19 0.356 -2.916 -3.856 –
SΓ‘nchez et al. 2020 295.317 40.197 – -2.893 -3.727 –
Donor et al. 2020 295.32 40.195 – -2.96 -3.87 2.7
Cantat-Gaudin & Anders 2020 295.327 40.19 0.356 -2.916 -3.856 –
Liu & Pang 2019 295.329 40.191 0.357 -2.908 -3.865 –
Bossini et al. 2019 295.327 40.19 – – – –
Soubiran et al. 2018 295.327 40.19 – – – 3.31
Bica et al. 2019 295.333 40.175 – – – –
Cantat-Gaudin et al. 2018 295.327 40.19 0.356 -2.916 -3.856 –
Loktin & Popova 2017 295.32 40.195 – -3.191 -0.848 1.0
Kharchenko et al. 2016 295.316 40.193 – – – –
Dias et al. 2014 295.317 40.197 – -6.07 -3.57 –
Kharchenko et al. 2013 295.32 40.195 – -3.99 -0.3 1.0
Gozha et al. 2012 295.325 40.187 – – – –
Kharchenko et al. 2007 295.32 40.19 – 0.04 – –
van den Bergh 2006 295.325 40.187 – – – –
Chen et al. 2003 295.319 40.197 – -3.14 -3.34 4.8
Dias et al. 2002 295.317 40.197 – -6.07 -3.57 2.3

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– 2.435 0.5 0.59 2265 0.053 7422 0.31 0.06
Nizovkina et al. 2025 2.28(4) 0.60(4) – 2667(4) -0.108(4) – – –
Li et al. 2025 2.43 0.50 – 2583 0.056 – – –
Hu & Soubiran 2025 – – – – -0.100(5) – – –
Wei et al. 2025 2.06 0.22 – 3800 0.250 8717 0.58 –
Carrasco-Varela et al. 2025 2.44 0.49 – 2630 0.050 – – 0.06(1)
Almeida et al. 2025 2.44 0.49 – 2630 – 7277 – –
Zhang et al. 2024 – – – – 0.009(1) – – –
Hunt & Reffert 2024 – – – – – 7568(1) – –
Cavallo et al. 2024 2.39 0.70 – 1995 0.000 – – –
Rain et al. 2024 2.13 0.39 – 4644 – 28157 0.18 –
Hunt & Reffert 2023 2.52 0.32 0.59 1683 – – – –
Cordoni et al. 2023 2.44 0.49 – 2630 0.093 4061 0.31 0.03
Just et al. 2023 – – – 1622 – 843 – –
Jaehnig et al. 2021 2.61(1) – – – – – – –
Rain et al. 2021 2.60 0.50 – 2291 – – – 15
Dias et al. 2021 2.44 0.49 – 2630 0.093 – – –
Cantat-Gaudin et al. 2020 2.77 0.40 – 2239 – – – –
Donor et al. 2020 – – – – 0.050 – – –
Cantat-Gaudin & Anders 2020 2.60 – – – – – – –
Liu & Pang 2019 – – – 3890 0.250 – – –
Bossini et al. 2019 2.71 0.47 – 2000 0.000 – – –
Soubiran et al. 2018 2.60 – – – – – – –
Cantat-Gaudin et al. 2018 2.60 – – – – – – –
Loktin & Popova 2017 2.41 0.72 – 1524 – – – –
Kharchenko et al. 2016 2.36 0.73 – 1622 – – – –
Kharchenko et al. 2013 2.36 0.73 – 1622 0.090 – – –
Gozha et al. 2012 2.36 – – 1493 0.090 – – –
van den Bergh 2006 2.36 0.74 – 1479 – – – –
Chen et al. 2003 2.36 0.74 – 1490 0.070(1) – – –
Dias et al. 2002 2.40 0.50 – 2291 -0.020 – – –

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

Visualization
ℹ️
Melotte 223 UCC
Melotte 223 HUNT23
Melotte 223 CANTAT20
Galactocentric position diagram