COIN-Gaia 34

(COIN 34)

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0.78 UTI
0.59
CN
1.0
Cdens
0.75
CC3
0.79
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 68
Radius (P>50% members) 10.8 [arcmin]
  • CN 0.59 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.79 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
COIN-Gaia 34 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near 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 age parameter (see Parameters). It is well-studied in the literature.
Close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for COIN-Gaia 34 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 – 31.216 61.777 1.038 -2.28 0.802 -25.114
Li et al. 2025 31.231 61.776 1.006 -2.231 0.866 –
Almeida et al. 2025 31.235 61.784 – – – –
Alfonso et al. 2024 31.038 61.845 1.025 -2.225 0.716 –
Hunt & Reffert 2024 31.234 61.781 1.041 -2.275 0.796 -23.565
Cavallo et al. 2024 31.13 61.807 1.044 – – –
Hunt & Reffert 2023 31.234 61.781 1.041 -2.275 0.796 -23.565
Almeida et al. 2023 31.262 61.774 – – – –
He et al. 2022 31.254 61.794 1.049 -2.306 0.804 –
Tarricq et al. 2022 31.29 61.815 1.051 -2.256 0.784 –
Dias et al. 2021 31.235 61.784 1.008 -2.254 0.863 –
Cantat-Gaudin et al. 2020 31.231 61.776 1.006 -2.231 0.866 –
Cantat-Gaudin & Anders 2020 31.231 61.776 1.006 -2.231 0.866 –
Monteiro & Dias 2019 31.231 61.776 – – – 2.526
Cantat-Gaudin et al. 2019 31.231 61.776 1.01 -2.23 0.88 –

💡 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 0.85 1.95 – 42 -0.130 – – –
Almeida et al. 2025 0.95 1.93 – 158 – 164 – –
Alfonso et al. 2024 1.00 1.19 – 222 -0.082 – – –
Hunt & Reffert 2024 – – – – – 212* – –
Cavallo et al. 2024 1.00 1.95 – 87 0.120 – – –
Hunt & Reffert 2023 0.91 1.72 2.19 105 – – – –
Almeida et al. 2023 0.97 1.94 – 75 0.029 79* 0.68 –
He et al. 2022 – 2.25 – 50 – – – –
Tarricq et al. 2022 1.00 – – 245 – – – –
Dias et al. 2021 0.95 1.93 – 158 -0.084 – – –
Cantat-Gaudin et al. 2020 1.02 1.19 – 219 – – – –
Cantat-Gaudin & Anders 2020 0.97 – – – – – – –
Monteiro & Dias 2019 1.05 1.67 – 96 0.022 – – –
Cantat-Gaudin et al. 2019 0.97 – – – – – – –

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

Visualization
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COIN-Gaia 34 UCC
COIN-Gaia 34 HUNT23
COIN-Gaia 34 CANTAT20
Galactocentric position diagram