UPK 13

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0.83 UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.7
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 116
Radius (P>50% members) 7.4 [arcmin]
  • CN 0.76 Rich
  • 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 13 is a rich, 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 age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Note: This object shares a large 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: intermediate fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UPK 13 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 – 282.003 -18.277 1.059 -1.135 -4.13 7.379
Li et al. 2025 282.007 -18.281 1.063 -1.131 -4.104 –
Almeida et al. 2025 282.009 -18.289 – – – –
Alfonso et al. 2024 282.049 -18.228 0.954 -0.904 -4.026 –
Hunt & Reffert 2024 281.996 -18.286 1.057 -1.132 -4.102 5.5
Cavallo et al. 2024 282.021 -18.273 1.06 – – –
Hunt & Reffert 2023 281.996 -18.286 1.057 -1.132 -4.102 5.5
He et al. 2022 282.006 -18.284 1.056 -1.127 -4.144 –
Tarricq et al. 2022 281.989 -18.306 1.062 -1.131 -4.122 –
Dias et al. 2021 282.009 -18.289 1.059 -1.134 -4.081 –
Cantat-Gaudin et al. 2020 282.007 -18.281 1.063 -1.131 -4.104 –
Cantat-Gaudin & Anders 2020 282.007 -18.288 1.057 -1.13 -4.051 –
Sim et al. 2019 282.016 -18.295 – -1.15 -4.12 –

💡 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 0.81 0.88 – 142 -0.257 – – –
Almeida et al. 2025 0.93 0.89 – 275 – 281 – –
Alfonso et al. 2024 0.95 0.67 – 258 0.204 – – –
Hunt & Reffert 2024 – – – – – 334* – –
Cavallo et al. 2024 0.92 0.89 – 257 0.240 – – –
Hunt & Reffert 2023 0.90 0.63 0.79 132 – – – –
He et al. 2022 – 1.10 – 56 – – – –
Tarricq et al. 2022 0.93 – – 186 – – – –
Dias et al. 2021 0.93 0.89 – 275 0.205 – – –
Cantat-Gaudin et al. 2020 0.95 0.67 – 178 – – – –
Cantat-Gaudin & Anders 2020 0.92 – – – – – – –
Sim et al. 2019 0.92 – – 79 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 99 86.2 282.0 -18.28 1.06 -1.13 -4.12 6.59 0.0

💡 Note: The % column shows the percentage of members that UPK 13 shares with each listed object.

Visualization
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UPK 13 UCC
UPK 13 HUNT23
UPK 13 CANTAT20
Galactocentric position diagram