UPK 350

(OCSN 305)

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0.71 UTI
0.62
CN
0.42
Cdens
1.0
CC3
0.75
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 74
Radius (P>50% members) 46.7 [arcmin]
  • CN 0.62 Moderately populated
  • Cdens 0.42 Loose
  • CC3 1.0 Very 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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UPK 350 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a very close distance, above 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 absorption and age parameters (see Parameters). It is well-studied in the literature.
Very 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.

Hunt & Reffert (2024)
Classified as a moving group.

Data
🔍 Search references for UPK 350 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 – 101.719 48.688 2.301 -4.882 -6.331 1.547
Li et al. 2025 101.689 48.688 2.238 -4.845 -6.346 –
Almeida et al. 2025 101.742 48.684 – – – –
Alfonso et al. 2024 101.635 48.954 2.27 -4.838 -6.322 –
Zhang et al. 2024 101.748 48.332 – – – –
Cavallo et al. 2024 101.84 48.547 2.309 – – –
Hunt & Reffert 2023 101.747 48.332 2.318 -4.851 -6.343 2.09
Qin et al. 2023 101.64 48.59 2.29 -4.83 -6.33 1.57
He et al. 2022 101.617 48.828 2.309 -4.846 -6.318 –
Tarricq et al. 2022 101.646 48.722 2.308 -4.894 -6.307 –
Dias et al. 2021 101.742 48.684 2.23 -4.872 -6.375 5.613
Cantat-Gaudin et al. 2020 101.689 48.688 2.238 -4.845 -6.346 –
Cantat-Gaudin & Anders 2020 101.646 48.702 2.258 -4.849 -6.363 –
Sim et al. 2019 101.817 48.812 – -4.88 -6.39 –

💡 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 0.54 0.73 – 59 -0.043 – – –
Almeida et al. 2025 0.45 0.43 – 516 – 80 – –
Alfonso et al. 2024 0.46 0.19 – 53 -0.121 – – –
Zhang et al. 2024 – – – – -0.056* – – –
Cavallo et al. 2024 0.47 0.51 – 72 0.000 – – –
Hunt & Reffert 2023 0.42 0.10 0.51 200 – – – –
Qin et al. 2023 0.53 0.40 – 631 – – – –
He et al. 2022 – 0.45 – 112 – – – –
Tarricq et al. 2022 0.46 – – 135 – – – –
Dias et al. 2021 0.45 0.43 – 516 -0.121 – – –
Cantat-Gaudin et al. 2020 0.46 0.19 – 129 – – – –
Cantat-Gaudin & Anders 2020 0.44 – – – – – – –
Sim et al. 2019 0.44 – – 100 – – – –

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

Visualization
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UPK 350 UCC
UPK 350 HUNT23
UPK 350 CANTAT20
Galactocentric position diagram