UPK 12

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0.83 UTI
0.73
CN
1.0
Cdens
1.0
CC3
0.7
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 96
Radius (P>50% members) 15.5 [arcmin]
  • CN 0.73 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.7 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 12 is a moderately populated, very dense object of very 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UPK 12 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 – 288.866 -22.142 1.514 0.613 -6.691 4.335
Almeida et al. 2025 288.827 -22.186 – – – –
Alfonso et al. 2024 288.816 -21.986 1.463 0.615 -6.715 –
Hunt & Reffert 2024 288.873 -22.078 1.5 0.604 -6.694 -0.255
Cavallo et al. 2024 288.885 -21.801 1.502 – – –
Hunt & Reffert 2023 288.873 -22.078 1.5 0.604 -6.694 -0.255
Almeida et al. 2023 288.795 -22.145 – – – –
He et al. 2022 288.791 -22.165 1.527 0.605 -6.679 –
Tarricq et al. 2022 288.907 -22.153 1.498 0.618 -6.631 –
Dias et al. 2021 288.827 -22.186 1.54 0.617 -6.672 -40.746
Cantat-Gaudin et al. 2020 288.805 -22.143 1.541 0.579 -6.68 –
Cantat-Gaudin & Anders 2020 288.825 -22.145 1.524 0.611 -6.658 –
Sim et al. 2019 288.821 -22.141 – 0.58 -6.61 –

💡 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
Almeida et al. 2025 0.64 0.45 – 132 – 128 – –
Alfonso et al. 2024 0.63 0.22 – 313 0.017 – – –
Hunt & Reffert 2024 – – – – – 95* – –
Cavallo et al. 2024 0.66 0.36 – 219 0.410 – – –
Hunt & Reffert 2023 0.63 0.25 0.84 190 – – – –
Almeida et al. 2023 0.64 0.36 – 247 0.039 109* 0.41 –
He et al. 2022 – 0.50 – 141 – – – –
Tarricq et al. 2022 0.62 – – 219 – – – –
Dias et al. 2021 0.64 0.45 – 132 0.017 – – –
Cantat-Gaudin et al. 2020 0.63 0.22 – 200 – – – –
Cantat-Gaudin & Anders 2020 0.64 – – – – – – –
Sim et al. 2019 0.64 – – 79 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 98 67.7 288.85 -22.13 1.52 0.61 -6.68 4.97 0.0

💡 Note: The % column shows the percentage of members that UPK 12 shares with each listed object.

Visualization
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UPK 12 UCC
UPK 12 HUNT23
UPK 12 CANTAT20
Galactocentric position diagram