NGC 2439

(MWSC 1306)

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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%) 635
Radius (P>50% members) 3.1 [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
NGC 2439 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with 3 later reported entries. See table with shared members information.

Distant Moderate extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for NGC 2439 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 115.196 -31.695 0.256 -2.253 3.185 68.473
Li et al. 2025 115.194 -31.694 0.232 -2.283 3.159 –
Wei et al. 2025 115.186 -31.69 0.257 -2.237 3.187 –
Almeida et al. 2025 115.188 -31.689 – – – –
Hunt & Reffert 2024 115.207 -31.699 0.262 -2.254 3.187 68.467
Celli et al. 2024 115.194 -31.694 – – – –
Cavallo et al. 2024 115.193 -31.682 0.262 – – –
Hunt & Reffert 2023 115.207 -31.699 0.262 -2.254 3.187 68.467
Almeida et al. 2023 115.195 -31.687 – – – –
Just et al. 2023 115.195 -31.703 – – – –
Jaehnig et al. 2021 115.19 -31.694 0.265 -2.283 3.17 –
Rain et al. 2021 115.194 -31.694 0.232 -2.283 3.159 –
Dias et al. 2021 115.188 -31.689 0.238 -2.293 3.15 –
Cantat-Gaudin et al. 2020 115.194 -31.694 0.232 -2.283 3.159 –
SΓ‘nchez et al. 2020 115.188 -31.693 – -2.286 3.204 –
Cantat-Gaudin & Anders 2020 115.194 -31.694 0.232 -2.283 3.159 –
Dias et al. 2019 115.192 -31.694 0.232 -2.283 3.159 78.975
Soubiran et al. 2018 115.194 -31.694 – – – 68.22
Cantat-Gaudin et al. 2018 115.194 -31.694 0.232 -2.283 3.159 –
Loktin & Popova 2017 115.2 -31.705 – -0.301 -0.063 63.3
Kharchenko et al. 2016 115.195 -31.703 – – – –
Dias et al. 2014 115.187 -31.693 – -2.18 2.33 –
Kharchenko et al. 2013 115.2 -31.705 – -2.9 1.74 63.3
Gozha et al. 2012 115.188 -31.693 – – – –
Piskunov et al. 2008 115.177 -31.684 – – – –
Kharchenko et al. 2007 115.18 -31.69 – 0.18 – 62.7
van den Bergh 2006 115.2 -31.683 – – – –
Kharchenko et al. 2005 115.18 -31.69 – -1.94 2.21 –
Kharchenko et al. 2003 115.23 -31.67 – -1.25 2.38 –
Chen et al. 2003 115.231 -31.624 – -2.22 3.13 68.0
Dias et al. 2002 115.188 -31.693 – -2.22 3.13 66.0
Dambis 1999 115.187 -31.693 – – – –

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 3.63 1.22 – 24 -0.055 – – –
Wei et al. 2025 3.50 1.30 – 38 -0.250 3665 0.53 –
Almeida et al. 2025 3.39 1.35 – 22 – 1493 – –
Hunt & Reffert 2024 – – – – – 4662* – –
Celli et al. 2024 – – – 12 – 2712 – –
Cavallo et al. 2024 3.42 1.29 – 35 -0.210 – – –
Hunt & Reffert 2023 3.51 0.94 0.81 58 – – – –
Almeida et al. 2023 3.33 1.35 – 24 -0.178 2656* 0.55 –
Just et al. 2023 – – – 18 – 5861 – –
Jaehnig et al. 2021 3.81* – – – – – – –
Rain et al. 2021 3.83 1.15 – 10 – – – 0
Dias et al. 2021 3.39 1.35 – 22 -0.117 – – –
Cantat-Gaudin et al. 2020 3.72 1.33 – 12 – – – –
Cantat-Gaudin & Anders 2020 3.83 – – – – – – –
Dias et al. 2019 2.97 1.02 – 29 -2.028 – – –
Soubiran et al. 2018 3.83 – – – – – – –
Cantat-Gaudin et al. 2018 3.83 – – – – – – –
Loktin & Popova 2017 3.87 1.25 – 18 – – – –
Kharchenko et al. 2016 3.83 1.35 – 18 – – – –
Kharchenko et al. 2013 3.83 1.35 – 18 – – – –
Gozha et al. 2012 1.30 – – 10 – 3236 – –
Piskunov et al. 2008 3.85 1.24 – 7 – – – –
van den Bergh 2006 3.85 1.27 – 18 – – – –
Kharchenko et al. 2005 3.85 1.24 – 7 – – – –
Kharchenko et al. 2003 3.85 1.27 – – – – – –
Chen et al. 2003 3.85 – – 10 – – – –
Dias et al. 2002 1.30 1.15 – 10 – – – –
Dambis 1999 3.80 1.29 – 16 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0430 18.4 115.2 -31.69 0.27 -2.25 3.2 69.12 0.0
OC 0429 8.7 115.19 -31.7 0.23 -2.25 3.19 69.12 0.0
CWWDL 3541 1.3 115.01 -31.56 0.26 -2.22 3.06 – 0.06

πŸ’‘ Note: The % column shows the percentage of members that NGC 2439 shares with each listed object.

Visualization
ℹ️
NGC 2439 UCC
NGC 2439 HUNT23
NGC 2439 CANTAT20
Galactocentric position diagram