COIN-Gaia 20

(COIN 20)

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0.77 UTI
0.55
CN
1.0
Cdens
0.75
CC3
0.78
Clit
1.0
Cdup
N50 (P>50% members) 59
Stellar density (N50/rad) 6.9 [N/pc2]
C3 classification AB
  • CN 0.55 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.78 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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COIN-Gaia 20 is a moderately populated, very dense object of 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, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is well-studied in the literature.

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

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for COIN-Gaia 20 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– 78.638 31.722 0.923 0.495 -1.496 -1.433
Li et al. 2025 78.634 31.691 0.911 0.548 -1.455 –
Almeida et al. 2025 78.625 31.705 – – – –
Zhang et al. 2024 78.636 31.72 – – – –
Hunt & Reffert 2024 78.636 31.72 0.921 0.539 -1.499 -0.447
Cavallo et al. 2024 78.745 31.572 0.922 – – –
Hunt & Reffert 2023 78.636 31.72 0.921 0.539 -1.499 -0.447
Almeida et al. 2023 78.686 31.66 – – – –
He et al. 2022 78.627 31.709 0.936 0.507 -1.517 –
Tarricq et al. 2022 78.664 31.67 0.919 0.495 -1.519 –
Dias et al. 2021 78.625 31.705 0.916 0.547 -1.465 –
Cantat-Gaudin et al. 2020 78.634 31.691 0.911 0.548 -1.455 –
Cantat-Gaudin & Anders 2020 78.634 31.691 0.911 0.548 -1.455 –
Monteiro & Dias 2019 78.634 31.691 – – – 2.408
Cantat-Gaudin et al. 2019 78.634 31.691 0.91 0.55 -1.45 –

💡 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– 1.02 0.97 0.61 70 -0.074 188 0.52 –
Li et al. 2025 0.95 0.84 – 64 -0.242 – – –
Almeida et al. 2025 1.00 1.00 – 70 – 69 – –
Zhang et al. 2024 – – – – -0.166(1) – – –
Hunt & Reffert 2024 – – – – – 188(1) – –
Cavallo et al. 2024 1.05 0.89 – 44 0.040 – – –
Hunt & Reffert 2023 1.01 0.71 0.61 74 – – – –
Almeida et al. 2023 1.02 1.08 – 179 -0.128 220(1) 0.52 –
He et al. 2022 – 1.05 – 32 – – – –
Tarricq et al. 2022 1.02 – – 85 – – – –
Dias et al. 2021 1.00 1.00 – 70 -0.021 – – –
Cantat-Gaudin et al. 2020 1.04 0.63 – 85 – – – –
Cantat-Gaudin & Anders 2020 1.06 – – – – – – –
Monteiro & Dias 2019 1.17 0.97 – 68 0.040 – – –
Cantat-Gaudin et al. 2019 1.06 – – – – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 66 89.8 78.64 31.7 0.92 0.48 -1.51 -1.43 0.03

💡 Note: The % column shows the percentage of members that COIN-Gaia 20 shares with each listed object.

Visualization
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COIN-Gaia 20 UCC
COIN-Gaia 20 HUNT23
COIN-Gaia 20 CANTAT20
Galactocentric position diagram