UBC 157

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0.76 UTI
0.54
CN
1.0
Cdens
0.75
CC3
0.75
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 57
Radius (P>50% members) 7.7 [arcmin]
  • CN 0.54 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.75 Well-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 157 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, intermediate-age 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.

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UBC 157 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 – 328.742 49.725 0.834 2.078 -0.299 -17.069
Li et al. 2025 328.682 49.748 0.82 2.123 -0.296 –
Hu & Soubiran 2025 328.879 49.73 – – – –
Almeida et al. 2025 328.752 49.711 – – – –
Zhang et al. 2024 328.789 49.683 – – – –
Hunt & Reffert 2024 328.789 49.683 0.841 2.099 -0.292 -20.752
Cavallo et al. 2024 328.879 49.73 0.841 – – –
Hunt & Reffert 2023 328.789 49.683 0.841 2.099 -0.292 -20.752
Almeida et al. 2023 328.751 49.712 – – – –
He et al. 2022 328.759 49.71 0.838 2.069 -0.3 –
Tarricq et al. 2022 328.724 49.764 0.829 1.993 -0.382 –
Dias et al. 2021 328.752 49.711 0.834 2.115 -0.32 –
Cantat-Gaudin et al. 2020 328.682 49.748 0.82 2.123 -0.296 –
Castro-Ginard et al. 2020 328.721 49.743 0.82 2.13 -0.306 –

💡 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 1.08 0.87 – 89 -0.146 – – –
Hu & Soubiran 2025 – – – – -0.120* – – –
Almeida et al. 2025 1.19 0.97 – 124 – 220 – –
Zhang et al. 2024 – – – – -0.039* – – –
Hunt & Reffert 2024 – – – – – 275* – –
Cavallo et al. 2024 1.16 0.73 – 661 0.070 – – –
Hunt & Reffert 2023 1.15 0.60 0.84 332 – – – –
Almeida et al. 2023 1.15 0.89 – 179 0.001 183* 0.43 –
He et al. 2022 – 0.95 – 50 – – – –
Tarricq et al. 2022 1.12 – – 186 – – – –
Dias et al. 2021 1.19 0.97 – 124 0.063 – – –
Cantat-Gaudin et al. 2020 1.15 0.71 – 178 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 14119 91.2 328.77 49.73 0.84 2.07 -0.29 -17.07 0.04

💡 Note: The % column shows the percentage of members that UBC 157 shares with each listed object.

Visualization
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UBC 157 UCC
UBC 157 HUNT23
UBC 157 CANTAT20
Galactocentric position diagram