UBC 439

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0.55 UTI
0.43
CN
0.37
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 43
Radius (P>50% members) 5.0 [arcmin]
  • CN 0.43 Poorly populated
  • Cdens 0.37 Loose
  • 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 439 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is moderately studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UBC 439 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 – 94.49 10.753 0.302 0.375 -0.965 34.231
Li et al. 2025 94.541 10.752 0.303 0.417 -0.944 –
Almeida et al. 2025 94.546 10.766 – – – –
Zhang et al. 2024 94.47 10.753 – – – –
Hunt & Reffert 2024 94.47 10.753 0.297 0.376 -0.963 34.242
Cavallo et al. 2024 94.543 10.724 0.3 – – –
Hunt & Reffert 2023 94.47 10.753 0.297 0.376 -0.963 34.242
Almeida et al. 2023 94.544 10.761 – – – –
Dias et al. 2021 94.546 10.766 0.282 0.443 -0.95 –
Cantat-Gaudin et al. 2020 94.541 10.752 0.303 0.417 -0.944 –
Castro-Ginard et al. 2020 94.548 10.753 0.306 0.44 -0.945 –

💡 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 2.76 1.26 – 323 -0.158 – – –
Almeida et al. 2025 2.77 1.40 – 280 – 524 – –
Zhang et al. 2024 – – – – -0.254* – – –
Hunt & Reffert 2024 – – – – – 429* – –
Cavallo et al. 2024 2.74 1.65 – 209 -0.380 – – –
Hunt & Reffert 2023 2.83 1.07 0.82 225 – – – –
Almeida et al. 2023 2.57 1.39 – 287 -0.175 471* 0.50 –
Dias et al. 2021 2.77 1.40 – 280 -0.146 – – –
Cantat-Gaudin et al. 2020 3.06 0.81 – 355 – – – –

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

Visualization
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UBC 439 UCC
UBC 439 HUNT23
UBC 439 CANTAT20
Galactocentric position diagram