UPK 594

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0.52 UTI
0.33
CN
0.22
Cdens
0.75
CC3
0.65
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 33
Radius (P>50% members) 19.7 [arcmin]
  • CN 0.33 Poorly populated
  • Cdens 0.22 Very loose
  • CC3 0.75 High quality
  • Clit 0.65 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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UPK 594 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a 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 moderately studied in the literature.
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 UPK 594 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 – 218.941 -67.999 1.052 -1.947 -3.108 0.214
Li et al. 2025 219.173 -67.975 1.029 -1.9 -3.118 –
Almeida et al. 2025 218.608 -68.005 – – – –
Alfonso et al. 2024 219.153 -67.844 1.017 -2.091 -3.147 –
Hunt & Reffert 2024 218.776 -67.937 1.045 -2.053 -3.126 -0.111
Cavallo et al. 2024 218.836 -67.962 1.048 – – –
Hunt & Reffert 2023 218.776 -67.937 1.045 -2.053 -3.126 -0.111
Tarricq et al. 2022 219.351 -68.053 1.068 -1.893 -3.108 –
Dias et al. 2021 218.608 -68.005 1.037 -2.001 -3.095 –
Cantat-Gaudin et al. 2020 219.173 -67.975 1.029 -1.9 -3.118 –
Cantat-Gaudin & Anders 2020 218.738 -67.996 1.029 -1.975 -3.129 –
Sim et al. 2019 218.917 -67.966 – -1.98 -3.16 –

💡 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 0.92 – 77 0.148 – – –
Almeida et al. 2025 0.95 0.94 – 324 – 134 – –
Alfonso et al. 2024 0.94 0.81 – 74 0.113 – – –
Hunt & Reffert 2024 – – – – – 111* – –
Cavallo et al. 2024 0.92 0.74 – 417 0.160 – – –
Hunt & Reffert 2023 0.91 0.72 1.11 104 – – – –
Tarricq et al. 2022 0.91 – – 155 – – – –
Dias et al. 2021 0.95 0.94 – 324 0.113 – – –
Cantat-Gaudin et al. 2020 0.94 0.81 – 151 – – – –
Cantat-Gaudin & Anders 2020 0.95 – – – – – – –
Sim et al. 2019 0.94 – – 79 – – – –

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

Visualization
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UPK 594 UCC
UPK 594 HUNT23
UPK 594 CANTAT20
Galactocentric position diagram