UBC 129

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0.78 UTI
0.82
CN
1.0
Cdens
1.0
CC3
0.55
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 294
Radius (P>50% members) 16.8 [arcmin]
  • CN 0.82 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.55 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 129 is a rich, very dense object of very 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 massive, near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Moderate extinction Massive Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UBC 129 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 – 299.07 26.449 0.851 -0.991 -4.359 -9.13
Li et al. 2025 299.05 26.448 0.844 -0.967 -4.337 –
Zhang et al. 2024 299.035 26.445 – – – –
Hunt & Reffert 2024 299.035 26.445 0.86 -0.984 -4.369 -13.241
Cavallo et al. 2024 299.055 26.512 0.859 – – –
Hunt & Reffert 2023 299.035 26.445 0.86 -0.984 -4.369 -13.241
He et al. 2022 299.038 26.446 0.853 -1.002 -4.353 –
Tarricq et al. 2022 299.042 26.423 0.848 -0.996 -4.368 –
Cantat-Gaudin et al. 2020 299.05 26.448 0.844 -0.967 -4.337 –
Castro-Ginard et al. 2020 299.066 26.442 0.847 -0.973 -4.341 –

💡 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 1.09 1.60 – 56 0.144 – – –
Zhang et al. 2024 – – – – -0.148* – – –
Hunt & Reffert 2024 – – – – – 1275* – –
Cavallo et al. 2024 1.25 1.84 – 46 0.410 – – –
Hunt & Reffert 2023 1.10 1.80 2.21 56 – – – –
He et al. 2022 – 1.90 – 32 – – – –
Tarricq et al. 2022 1.18 – – 60 – – – –
Cantat-Gaudin et al. 2020 1.21 1.11 – 52 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 14402 25.2 299.05 26.48 0.85 -1.0 -4.36 -11.68 0.0

💡 Note: The % column shows the percentage of members that UBC 129 shares with each listed object.

Visualization
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UBC 129 UCC
UBC 129 HUNT23
UBC 129 CANTAT20
Galactocentric position diagram