COIN-Gaia 2

(COIN 2; FoF 2208)

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0.00 UTI
0.78
CN
1.0
Cdens
1.0
CC3
0.6
Clit
0.0
Cdup
C3 classification AA
Number of members (P>50%) 185
Radius (P>50% members) 8.8 [arcmin]
  • CN 0.78 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.6 Moderately studied
  • Cdup 0.0 Very likely duplicate
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
COIN-Gaia 2 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is moderately studied in the literature.

⚠ī¸ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Data
🔍 Search references for COIN-Gaia 2 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 15.054 55.409 0.773 -4.438 -2.055 -32.253
Li et al. 2025 15.06 55.409 0.787 -4.457 -1.933 –
Almeida et al. 2025 15.052 55.401 – – – –
Tarricq et al. 2022 15.103 55.392 0.773 -4.44 -2.06 –
Rain et al. 2021 15.06 55.409 0.787 -4.457 -1.933 –
Dias et al. 2021 15.052 55.401 0.808 -4.474 -1.945 -31.991
Cantat-Gaudin et al. 2020 15.06 55.409 0.787 -4.457 -1.933 –
Cantat-Gaudin & Anders 2020 15.06 55.409 0.787 -4.457 -1.933 –
Liu & Pang 2019 15.081 55.405 0.772 -4.454 -1.901 –
Monteiro & Dias 2019 15.06 55.409 – – – 2.317
Cantat-Gaudin et al. 2019 15.06 55.409 0.79 -4.46 -1.96 –

💡 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 1.16 0.78 – 587 0.028 – – –
Almeida et al. 2025 1.12 0.99 – 585 – 418 – –
Tarricq et al. 2022 1.17 – – 724 – – – –
Rain et al. 2021 1.23 0.87 – 427 – – – 0
Dias et al. 2021 1.12 0.99 – 585 -0.054 – – –
Cantat-Gaudin et al. 2020 1.20 0.46 – 661 – – – –
Cantat-Gaudin & Anders 2020 1.23 – – – – – – –
Liu & Pang 2019 – – – 537 -0.750 – – –
Monteiro & Dias 2019 1.18 0.89 – 432 0.017 – – –
Cantat-Gaudin et al. 2019 1.23 – – – – – – –
Cluster % RA DEC Plx pmRA pmDE Rv UTI
AT 21 100.0 15.05 55.41 0.77 -4.43 -2.06 -32.59 0.63
UBC 35 100.0 15.05 55.41 0.77 -4.44 -2.05 -32.45 0.01
CWWDL 3306 36.2 15.08 55.39 0.78 -4.44 -2.08 -32.19 0.0

💡 Note: The % column shows the percentage of members that COIN-Gaia 2 shares with each listed object.

Visualization
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COIN-Gaia 2 UCC
COIN-Gaia 2 CANTAT20
Galactocentric position diagram