Melotte 169

(Collinder 327; VDBH 224; IC 4651; MWSC 2590; OCL 987; vdBergh-Hagen 224; ESO 228 02; FSR 1738; FoF 2053)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 929
Radius (P>50% members) 11.9 [arcmin]
  • 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 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Melotte 169 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the absorption, age, 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.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Close Low extinction Massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 169 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 261.216 -49.916 1.062 -2.429 -5.053 -29.922
Li et al. 2025 261.212 -49.917 1.056 -2.41 -5.064 –
Hu & Soubiran 2025 261.224 -49.918 – – – –
Wei et al. 2025 261.185 -49.919 1.065 -2.43 -5.048 –
Almeida et al. 2025 261.213 -49.916 – – – –
Alfonso et al. 2024 261.226 -49.902 1.02 -2.423 -5.063 –
Hunt & Reffert 2024 261.192 -49.929 1.061 -2.433 -5.057 -29.704
Cavallo et al. 2024 261.224 -49.918 1.061 – – –
Hunt & Reffert 2023 261.192 -49.929 1.061 -2.433 -5.057 -29.704
Just et al. 2023 261.214 -49.935 – – – –
He et al. 2022 261.202 -49.923 1.064 -2.429 -5.053 –
Tarricq et al. 2022 261.198 -49.929 1.062 -2.425 -5.049 –
Jaehnig et al. 2021 261.194 -49.924 1.087 -2.419 -5.029 –
Rain et al. 2021 261.212 -49.917 1.056 -2.41 -5.064 –
Dias et al. 2021 261.213 -49.916 1.06 -2.412 -5.05 -30.029
Cantat-Gaudin et al. 2020 261.212 -49.917 1.056 -2.41 -5.064 –
SΓ‘nchez et al. 2020 261.204 -49.933 – -2.438 -5.132 –
Cantat-Gaudin & Anders 2020 261.212 -49.917 1.056 -2.41 -5.064 –
Liu & Pang 2019 261.216 -49.918 1.059 -2.408 -5.053 –
Soubiran et al. 2018 261.212 -49.917 – – – -30.33
Bica et al. 2019 261.214 -49.947 – – – –
Cantat-Gaudin et al. 2018 261.212 -49.917 1.056 -2.41 -5.064 –
Loktin & Popova 2017 261.195 -49.939 – -2.078 -3.679 -31.0
Kharchenko et al. 2016 261.214 -49.935 – – – –
Dias et al. 2014 261.204 -49.933 – -1.57 -2.62 –
Kharchenko et al. 2013 261.225 -49.935 – -0.85 -2.2 -31.0
Gozha et al. 2012 261.204 -49.933 – – – –
Piskunov et al. 2008 261.197 -49.928 – – – –
Kharchenko et al. 2007 261.21 -49.93 – 0.18 – –
van den Bergh 2006 261.204 -49.933 – – – –
Kharchenko et al. 2005 261.21 -49.93 – -0.81 -2.17 –
Kharchenko et al. 2003 261.19 -49.94 – -1.16 -2.42 –
Chen et al. 2003 261.197 -49.928 – 1.5 -5.35 -31.0
Dias et al. 2002 261.204 -49.933 – -1.57 -2.62 -30.8

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] Bfr BSS
Li et al. 2025 0.90 0.34 – 2087 0.063 – – –
Hu & Soubiran 2025 – – – – -0.180* – – –
Wei et al. 2025 2.81 2.42 – 295 -2.000 1736 0.41 –
Almeida et al. 2025 0.92 0.35 – 2065 – 1947 – –
Alfonso et al. 2024 0.98 0.41 – 1477 0.117 – – –
Hunt & Reffert 2024 – – – – – 2329* – –
Cavallo et al. 2024 0.95 0.50 – 1479 0.200 – – –
Hunt & Reffert 2023 0.89 0.19 0.23 1663 – – – –
Just et al. 2023 – – – 1778 – 90 – –
He et al. 2022 – 0.60 – 1413 – – – –
Tarricq et al. 2022 0.96 – – 1660 – – – –
Jaehnig et al. 2021 0.92* – – – – – – –
Rain et al. 2021 0.92 0.34 – 1122 – – – 5
Dias et al. 2021 0.92 0.35 – 2065 0.120 – – –
Cantat-Gaudin et al. 2020 0.98 0.42 – 1660 – – – –
Cantat-Gaudin & Anders 2020 0.92 – – – – – – –
Liu & Pang 2019 – – – 295 -2.000 – – –
Soubiran et al. 2018 0.92 – – – – – – –
Cantat-Gaudin et al. 2018 0.92 – – – – – – –
Loktin & Popova 2017 0.89 0.36 – 1140 – – – –
Kharchenko et al. 2016 0.89 0.38 – 1778 – – – –
Kharchenko et al. 2013 0.89 0.38 – 1778 -0.128 – – –
Gozha et al. 2012 0.89 – – 1140 0.150 123 – –
Piskunov et al. 2008 0.89 0.37 – 832 – – – –
van den Bergh 2006 0.89 0.37 – 1148 – – – –
Kharchenko et al. 2005 0.89 0.37 – 832 – – – –
Kharchenko et al. 2003 0.89 0.37 – – – – – –
Chen et al. 2003 0.89 0.36 – 1140 0.090* – – –
Dias et al. 2002 0.89 0.36 – 1140 0.150 – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWNU 1213 2.3 261.23 -49.89 1.03 -2.31 -5.04 -30.84 0.06

πŸ’‘ Note: The % column shows the percentage of members that Melotte 169 shares with each listed object.

Visualization
ℹ️
Melotte 169 UCC
Melotte 169 HUNT23
Melotte 169 CANTAT20
Galactocentric position diagram