Haffner 6

(MWSC 1177; OCL 582)

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0.97 UTI
0.86
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 386
Radius (P>50% members) 3.2 [arcmin]
  • CN 0.86 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Haffner 6 is a 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 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.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age Contains BSS

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 6 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 109.991 -13.153 0.2 -1.261 2.004 71.116
Li et al. 2025 109.998 -13.151 0.204 -1.22 1.96 –
Hu & Soubiran 2025 109.986 -13.152 – – – –
Almeida et al. 2025 109.998 -13.153 – – – –
Hunt & Reffert 2024 109.991 -13.152 0.206 -1.253 2.0 84.394
Cavallo et al. 2024 109.986 -13.152 0.204 – – –
Hunt & Reffert 2023 109.991 -13.152 0.206 -1.253 2.0 84.394
Almeida et al. 2023 109.998 -13.152 – – – –
Just et al. 2023 110.009 -13.148 – – – –
Jaehnig et al. 2021 109.997 -13.152 0.223 -1.223 1.949 –
Rain et al. 2021 109.998 -13.151 0.204 -1.22 1.96 –
Dias et al. 2021 109.998 -13.153 0.212 -1.226 1.964 69.56
Cantat-Gaudin et al. 2020 109.998 -13.151 0.204 -1.22 1.96 –
Cantat-Gaudin & Anders 2020 109.998 -13.151 0.204 -1.22 1.96 –
Bossini et al. 2019 109.998 -13.151 – – – –
Soubiran et al. 2018 109.998 -13.151 – – – 70.03
Bica et al. 2019 109.999 -13.146 – – – –
Cantat-Gaudin et al. 2018 109.998 -13.151 0.204 -1.22 1.96 –
Loktin & Popova 2017 110.025 -13.15 – -0.749 3.885 –
Kharchenko et al. 2016 110.009 -13.148 – – – –
Dias et al. 2014 110.025 -13.133 – -0.55 3.58 –
Kharchenko et al. 2013 110.014 -13.15 – 0.36 4.16 –
van den Bergh 2006 109.988 -13.161 – – – –
Dias et al. 2002 110.025 -13.133 – -0.55 3.58 –

💡 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 4.67 1.74 – 656 0.052 – – –
Hu & Soubiran 2025 – – – – -0.280* – – –
Almeida et al. 2025 3.86 1.94 – 684 – 1696 – –
Hunt & Reffert 2024 – – – – – 2806* – –
Cavallo et al. 2024 3.27 2.14 – 603 -0.510 – – –
Hunt & Reffert 2023 4.42 1.63 1.56 439 – – – –
Almeida et al. 2023 4.11 2.08 – 430 -0.219 1745* 0.63 –
Just et al. 2023 – – – 733 – 733 – –
Jaehnig et al. 2021 4.43* – – – – – – –
Rain et al. 2021 4.29 1.40 – 661 – – – 1
Dias et al. 2021 3.86 1.94 – 684 -0.183 – – –
Cantat-Gaudin et al. 2020 4.47 1.36 – 617 – – – –
Cantat-Gaudin & Anders 2020 4.29 – – – – – – –
Bossini et al. 2019 4.29 1.46 – 542 0.000 – – –
Soubiran et al. 2018 4.29 – – – – – – –
Cantat-Gaudin et al. 2018 4.29 – – – – – – –
Loktin & Popova 2017 2.21 2.61 – 81 – – – –
Kharchenko et al. 2016 3.32 1.87 – 733 – – – –
Kharchenko et al. 2013 3.32 1.87 – 733 – – – –
van den Bergh 2006 3.05 1.40 – 676 – – – –
Dias et al. 2002 3.05 1.40 – 670 – – – –

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

Visualization
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Haffner 6 UCC
Haffner 6 HUNT23
Haffner 6 CANTAT20
Galactocentric position diagram