UPK 533

(OCSN 311)

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0.66 UTI
0.75
CN
0.5
Cdens
0.75
CC3
0.65
Clit
1.0
Cdup
C3 classification BA
Number of members (P>50%) 100
Radius (P>50% members) 63.6 [arcmin]
  • CN 0.75 Rich
  • Cdens 0.5 Moderately dense
  • 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 533 is a rich, moderately dense object of high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is moderately studied in the literature.
Very close Low extinction Near-solar metallicity Young

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

Data
🔍 Search references for UPK 533 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 – 123.087 -52.563 2.93 -6.861 2.59 26.678
Li et al. 2025 122.798 -52.529 2.893 -6.788 2.615 –
Almeida et al. 2025 122.968 -52.314 – – – –
Alfonso et al. 2024 123.418 -52.495 2.896 -6.958 2.517 –
Almeida et al. 2023 123.379 -52.266 – – – –
Qin et al. 2023 123.57 -52.4 2.95 -7.0 2.65 28.33
He et al. 2022 123.549 -52.543 2.932 -7.099 2.682 –
Tarricq et al. 2022 122.461 -52.555 2.933 -6.951 2.595 –
Dias et al. 2021 122.968 -52.314 2.86 -6.819 2.577 30.968
Cantat-Gaudin et al. 2020 122.798 -52.529 2.893 -6.788 2.615 –
Cantat-Gaudin & Anders 2020 122.887 -52.521 2.869 -6.876 2.634 –
Sim et al. 2019 123.496 -52.397 – -7.03 2.57 –

💡 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 0.40 0.29 – 107 0.146 – – –
Almeida et al. 2025 0.35 0.39 – 89 – 88 – –
Alfonso et al. 2024 0.35 0.01 – 62 -0.109 – – –
Almeida et al. 2023 0.34 0.09 – 284 0.072 112* 0.73 –
Qin et al. 2023 0.40 0.34 – 71 – – – –
He et al. 2022 – 0.25 – 71 – – – –
Tarricq et al. 2022 0.34 – – 91 – – – –
Dias et al. 2021 0.35 0.39 – 89 -0.109 – – –
Cantat-Gaudin et al. 2020 0.35 0.01 – 89 – – – –
Cantat-Gaudin & Anders 2020 0.35 – – – – – – –
Sim et al. 2019 0.35 – – 79 – – – –

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

Visualization
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UPK 533 UCC
UPK 533 CANTAT20
Galactocentric position diagram