UBC 27

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0.74 UTI
0.74
CN
1.0
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 99
Radius (P>50% members) 7.2 [arcmin]
  • CN 0.74 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.6 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 27 is a moderately populated, 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 27 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 – 294.337 15.584 0.879 -0.803 -6.247 -6.4
Li et al. 2025 294.337 15.589 0.882 -0.827 -6.226 –
Hunt & Reffert 2024 294.338 15.595 0.87 -0.8 -6.245 0.45
Cavallo et al. 2024 294.325 15.59 0.872 – – –
Hunt & Reffert 2023 294.338 15.595 0.87 -0.8 -6.245 0.45
He et al. 2022 294.321 15.582 0.879 -0.797 -6.251 –
Tarricq et al. 2022 294.348 15.575 0.871 -0.802 -6.244 –
Cantat-Gaudin et al. 2020 294.337 15.589 0.882 -0.827 -6.226 –
Cantat-Gaudin & Anders 2020 294.337 15.589 0.882 -0.827 -6.226 –
Bica et al. 2019 294.308 15.587 – – – –
Castro-Ginard et al. 2018 294.319 15.587 0.882 -0.829 -6.223 –

💡 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 1.01 1.57 – 560 0.138 – – –
Hunt & Reffert 2024 – – – – – 421* – –
Cavallo et al. 2024 1.20 1.89 – 174 0.510 – – –
Hunt & Reffert 2023 1.08 1.72 1.59 200 – – – –
He et al. 2022 – 2.00 – 316 – – – –
Tarricq et al. 2022 1.10 – – 631 – – – –
Cantat-Gaudin et al. 2020 1.14 1.47 – 589 – – – –
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 27 UCC
UBC 27 HUNT23
UBC 27 CANTAT20
Galactocentric position diagram