UPK 333

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0.62 UTI
0.34
CN
0.51
Cdens
0.75
CC3
0.75
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 34
Radius (P>50% members) 17.6 [arcmin]
  • CN 0.34 Poorly populated
  • Cdens 0.51 Moderately dense
  • CC3 0.75 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 333 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a 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 well-studied in the literature.
Close Moderate 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 333 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 – 61.794 44.112 1.401 2.483 -6.453 15.056
Li et al. 2025 61.771 44.094 1.348 2.491 -6.466 –
Almeida et al. 2025 61.867 44.144 – – – –
Alfonso et al. 2024 62.187 44.098 1.347 2.223 -6.134 –
Zhang et al. 2024 61.69 44.189 – – – –
Hunt & Reffert 2024 61.69 44.189 1.4 2.511 -6.431 14.508
Cavallo et al. 2024 61.84 44.175 1.405 – – –
Hunt & Reffert 2023 61.69 44.189 1.4 2.511 -6.431 14.508
Almeida et al. 2023 61.862 44.138 – – – –
Dias et al. 2021 61.867 44.144 1.336 2.479 -6.467 24.288
Cantat-Gaudin et al. 2020 61.771 44.094 1.348 2.491 -6.466 –
Cantat-Gaudin & Anders 2020 61.806 44.103 1.361 2.511 -6.445 –
Sim et al. 2019 61.804 44.195 – 2.53 -6.47 –

💡 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 0.64 0.97 – 745 -0.141 – – –
Almeida et al. 2025 0.72 1.24 – 553 – 97 – –
Alfonso et al. 2024 0.71 0.74 – 705 0.051 – – –
Zhang et al. 2024 – – – – -0.104* – – –
Hunt & Reffert 2024 – – – – – 72* – –
Cavallo et al. 2024 0.68 0.95 – 407 0.500 – – –
Hunt & Reffert 2023 0.68 1.17 0.93 254 – – – –
Almeida et al. 2023 0.61 1.28 – 684 -0.168 175* 0.54 –
Tarricq et al. 2022 0.70 – – 776 – – – –
Dias et al. 2021 0.72 1.24 – 553 0.051 – – –
Cantat-Gaudin et al. 2020 0.71 0.74 – 759 – – – –
Cantat-Gaudin & Anders 2020 0.72 – – – – – – –
Sim et al. 2019 0.72 – – 631 – – – –

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

Visualization
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UPK 333 UCC
UPK 333 HUNT23
UPK 333 CANTAT20
Galactocentric position diagram