Haffner 4

(MWSC 1094; OCL 583)

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0.90 UTI
0.77
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 143
Stellar density (N50/rad) 29.2 [N/pc2]
C3 classification AB
  • CN 0.77 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Haffner 4 is a rich, very dense object of high C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

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

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Haffner 4 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 106.512 -15.006 0.197 -0.411 0.948 57.316
Li et al. 2025 106.512 -15.002 0.223 -0.417 0.904 –
Hu & Soubiran 2025 106.506 -15.002 – – – –
Almeida et al. 2025 106.51 -15.0 – – – –
Hunt & Reffert 2024 106.515 -15.005 0.201 -0.407 0.96 58.414
Cavallo et al. 2024 106.506 -15.002 0.2 – – –
Hunt & Reffert 2023 106.515 -15.005 0.201 -0.407 0.96 58.414
Almeida et al. 2023 106.51 -15.004 – – – –
Just et al. 2023 106.516 -14.993 – – – –
Dias et al. 2021 106.51 -15.0 0.24 -0.39 0.918 –
Cantat-Gaudin et al. 2020 106.512 -15.002 0.223 -0.417 0.904 –
Donor et al. 2020 106.522 -14.995 – -0.48 0.92 59.5
Cantat-Gaudin & Anders 2020 106.512 -15.002 0.223 -0.417 0.904 –
Soubiran et al. 2018 106.512 -15.002 – – – 57.05
Bica et al. 2019 106.519 -14.999 – – – –
Cantat-Gaudin et al. 2018 106.512 -15.002 0.223 -0.417 0.904 –
Loktin & Popova 2017 106.53 -14.997 – 3.736 -1.05 –
Kharchenko et al. 2016 106.516 -14.993 – – – –
Dias et al. 2014 106.55 -14.983 – 0.25 -0.39 –
Kharchenko et al. 2013 106.522 -14.995 – 4.42 -0.1 –
Gozha et al. 2012 106.55 -14.983 – – – –
Dias et al. 2002 106.55 -14.983 – 0.25 -0.39 –

💡 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– 4.14 1.48 1.45 733 -0.237 595 0.8 –
Li et al. 2025 4.44 1.31 – 743 -0.150 – – –
Hu & Soubiran 2025 – – – – -0.360(5) – – –
Almeida et al. 2025 4.02 1.60 – 422 – 405 – –
Hunt & Reffert 2024 – – – – – 739(1) – –
Cavallo et al. 2024 4.06 1.47 – 562 0.240 – – –
Hunt & Reffert 2023 4.14 1.13 1.45 509 – – – –
Almeida et al. 2023 4.20 1.49 – 733 -0.237 1119(1) 0.80 –
Just et al. 2023 – – – 1303 – 451 – –
Dias et al. 2021 4.02 1.60 – 422 -0.126 – – –
Cantat-Gaudin et al. 2020 5.06 1.05 – 457 – – – –
Donor et al. 2020 – – – – -0.160 – – –
Cantat-Gaudin & Anders 2020 3.98 – – – – – – –
Soubiran et al. 2018 3.98 – – – – – – –
Cantat-Gaudin et al. 2018 3.98 – – – – – – –
Loktin & Popova 2017 3.21 1.05 – 813 – – – –
Kharchenko et al. 2016 4.46 1.48 – 1303 – – – –
Kharchenko et al. 2013 4.46 1.48 – 1303 -0.380 – – –
Gozha et al. 2012 4.45 – – 1259 -0.380 – – –
Dias et al. 2002 4.50 1.55 – 501 -0.380 – – –

(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 0389 19.6 106.52 -15.0 0.19 -0.41 0.97 57.32 0.0

💡 Note: The % column shows the percentage of members that Haffner 4 shares with each listed object.

Visualization
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Haffner 4 UCC
Haffner 4 HUNT23
Haffner 4 CANTAT20
Galactocentric position diagram