UBC 54

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0.78 UTI
0.83
CN
1.0
Cdens
0.75
CC3
0.65
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 324
Radius (P>50% members) 13.9 [arcmin]
  • CN 0.83 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.65 Moderately studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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UBC 54 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively 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 metallicity parameter (see Parameters). It is moderately studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UBC 54 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 – 64.706 46.453 0.903 3.265 -3.808 -18.994
Li et al. 2025 64.747 46.453 0.879 3.32 -3.758 –
Wei et al. 2025 64.751 46.445 0.91 3.259 -3.813 –
Zhang et al. 2024 64.725 46.415 – – – –
Hunt & Reffert 2024 64.725 46.415 0.908 3.275 -3.809 -20.361
Cavallo et al. 2024 64.714 46.453 0.908 – – –
Hunt & Reffert 2023 64.725 46.415 0.908 3.275 -3.809 -20.361
He et al. 2022 64.72 46.438 0.914 3.269 -3.8 –
Tarricq et al. 2022 64.807 46.443 0.907 3.264 -3.809 –
Cantat-Gaudin et al. 2020 64.747 46.453 0.879 3.32 -3.758 –
Cantat-Gaudin & Anders 2020 64.747 46.453 0.879 3.32 -3.758 –
Castro-Ginard et al. 2019 64.721 46.439 0.878 3.325 -3.79 –

💡 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 1.00 1.05 – 413 -0.056 – – –
Wei et al. 2025 1.76 1.23 – 288 0.250 430 0.36 –
Zhang et al. 2024 – – – – -0.132* – – –
Hunt & Reffert 2024 – – – – – 957* – –
Cavallo et al. 2024 1.15 1.14 – 372 0.320 – – –
Hunt & Reffert 2023 1.04 0.97 0.82 280 – – – –
He et al. 2022 – 1.25 – 224 – – – –
Tarricq et al. 2022 1.07 – – 295 – – – –
Cantat-Gaudin et al. 2020 1.11 0.98 – 251 – – – –
Cantat-Gaudin & Anders 2020 1.10 – – – – – – –

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

Visualization
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UBC 54 UCC
UBC 54 HUNT23
UBC 54 CANTAT20
Galactocentric position diagram