Melotte 158

(Collinder 322; VDBH 209; NGC 6259; MWSC 2511; OCL 996; vdBergh-Hagen 209; ESO 277 22)

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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) 1891
Stellar density (N50/rad) 76.0 [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 158 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age 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.

Note: This object shares a very small percentage of members with 2 later reported entries. See table with shared members information.

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 158 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 255.194 -44.68 0.42 -1.038 -2.895 -34.401
Wei et al. 2025 255.193 -44.686 0.422 -1.039 -2.899 –
Almeida et al. 2025 255.197 -44.675 – – – –
Hunt & Reffert 2024 255.193 -44.677 0.424 -1.047 -2.893 -35.597
Cavallo et al. 2024 255.2 -44.681 0.424 – – –
Hunt & Reffert 2023 255.193 -44.677 0.424 -1.047 -2.893 -35.597
Just et al. 2023 255.214 -44.69 – – – –
Jaehnig et al. 2021 255.205 -44.687 0.44 -1.009 -2.893 –
Rain et al. 2021 255.195 -44.678 0.408 -1.015 -2.892 –
Dias et al. 2021 255.197 -44.675 0.415 -1.012 -2.882 -36.049
Cantat-Gaudin et al. 2020 255.195 -44.678 0.408 -1.015 -2.892 –
SΓ‘nchez et al. 2020 255.188 -44.655 – -0.994 -2.857 –
Cantat-Gaudin & Anders 2020 255.195 -44.678 0.408 -1.015 -2.892 –
Soubiran et al. 2018 255.195 -44.678 – – – -32.84
Bica et al. 2019 255.174 -44.657 – – – –
Cantat-Gaudin et al. 2018 255.195 -44.678 0.408 -1.015 -2.892 –
Loktin & Popova 2017 255.195 -44.656 – -4.431 -8.397 -33.7
Kharchenko et al. 2016 255.214 -44.69 – – – –
Dias et al. 2014 255.188 -44.655 – 0.94 -1.93 –
Kharchenko et al. 2013 255.225 -44.69 – -1.87 -5.27 -33.7
Gozha et al. 2012 255.187 -44.655 – – – –
Kharchenko et al. 2007 255.19 -44.65 – 0.12 – –
van den Bergh 2006 255.175 -44.667 – – – –
Chen et al. 2003 255.176 -44.671 – – – –
Dias et al. 2002 255.188 -44.655 – 1.04 -1.88 -34.66

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– 1.85 1.88 1.28 265 0.020 4946 0.23 0.0
Wei et al. 2025 3.95 1.88 – 576 0.500 4835 0.23 –
Almeida et al. 2025 1.81 2.11 – 329 – 5056 – –
Hunt & Reffert 2024 – – – – – 17779(1) – –
Cavallo et al. 2024 1.67 2.74 – 234 -0.400 – – –
Hunt & Reffert 2023 2.17 2.34 1.28 164 – – – –
Just et al. 2023 – – – 299 – 323 – –
Jaehnig et al. 2021 2.26(1) – – – – – – –
Rain et al. 2021 2.29 1.52 – 214 – – – 0
Dias et al. 2021 1.81 2.11 – 329 0.149 – – –
Cantat-Gaudin et al. 2020 2.31 1.87 – 269 – – – –
Cantat-Gaudin & Anders 2020 2.29 – – – – – – –
Soubiran et al. 2018 2.29 – – – – – – –
Cantat-Gaudin et al. 2018 2.29 – – – – – – –
Loktin & Popova 2017 1.18 1.47 – 265 – – – –
Kharchenko et al. 2016 1.85 2.00 – 299 – – – –
Kharchenko et al. 2013 1.85 2.00 – 299 0.020 – – –
Gozha et al. 2012 1.03 – – 217 0.020 – – –
van den Bergh 2006 1.03 1.55 – 219 – – – –
Chen et al. 2003 1.03 1.54 – 210 0.020(1) – – –
Dias et al. 2002 1.03 1.54 – 217 0.020 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0672 5.6 255.19 -44.68 0.46 -1.06 -2.92 -33.95 0.0
CWWDL 13441 1.3 255.28 -44.67 0.45 -1.09 -2.8 -33.63 0.0

πŸ’‘ Note: The % column shows the percentage of members that Melotte 158 shares with each listed object.

Visualization
ℹ️
Melotte 158 UCC
Melotte 158 HUNT23
Melotte 158 CANTAT20
Galactocentric position diagram