UPK 422

(OCSN 310)

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0.87 UTI
0.8
CN
1.0
Cdens
1.0
CC3
0.78
Clit
1.0
Cdup
N50 (P>50% members) 236
Stellar density (N50/rad) 9.4 [N/pc2]
C3 classification AA
  • CN 0.8 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.78 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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UPK 422 is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is well-studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UPK 422 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 99999– 87.879 -7.53 3.319 0.137 -0.564 15.74
Li et al. 2025 88.007 -7.543 3.316 0.187 -0.571 –
Almeida et al. 2025 87.901 -7.587 – – – –
Alfonso et al. 2024 88.01 -7.467 3.306 0.15 -0.579 –
Zhang et al. 2024 87.964 -7.39 – – – –
Hunt & Reffert 2024 87.964 -7.39 3.367 0.171 -0.609 12.199
Celli et al. 2024 88.007 -7.543 – – – –
Cavallo et al. 2024 87.502 -8.043 3.379 – – –
Hunt & Reffert 2023 87.964 -7.39 3.367 0.171 -0.609 12.199
Qin et al. 2023 88.49 -7.6 3.31 0.25 -0.54 14.76
He et al. 2022 88.098 -7.468 3.33 0.172 -0.55 –
Dias et al. 2021 87.901 -7.587 3.309 0.174 -0.567 25.452
Cantat-Gaudin et al. 2020 88.007 -7.543 3.316 0.187 -0.571 –
Cantat-Gaudin & Anders 2020 88.006 -7.534 3.314 0.183 -0.538 –
Sim et al. 2019 88.105 -7.539 – 0.25 -0.6 –

💡 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] Bfrac BSS
UCC 99999– 0.3 0.26 0.68 20 0.061 95 – –
Li et al. 2025 0.29 0.11 – 21 0.038 – – –
Almeida et al. 2025 0.30 0.36 – 26 – 114 – –
Alfonso et al. 2024 0.30 0.26 – 22 0.061 – – –
Zhang et al. 2024 – – – – -0.022(1) – – –
Hunt & Reffert 2024 – – – – – 88(1) – –
Celli et al. 2024 – – – 20 – 95 – –
Cavallo et al. 2024 0.29 0.61 – 15 0.090 – – –
Hunt & Reffert 2023 0.29 0.28 0.68 15 – – – –
Qin et al. 2023 0.31 0.22 – 20 – – – –
He et al. 2022 – 0.20 – 18 – – – –
Dias et al. 2021 0.30 0.36 – 26 0.061 – – –
Cantat-Gaudin et al. 2020 0.30 0.26 – 19 – – – –
Cantat-Gaudin & Anders 2020 0.30 – – – – – – –
Sim et al. 2019 0.30 – – 20 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 14554 22.9 88.52 -7.61 3.34 0.27 -0.56 12.95 0.0

💡 Note: The % column shows the percentage of members that UPK 422 shares with each listed object.

Visualization
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UPK 422 UCC
UPK 422 HUNT23
UPK 422 CANTAT20
Galactocentric position diagram