UPK 402

(OCSN 309)

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0.76 UTI
0.49
CN
1.0
Cdens
1.0
CC3
0.65
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 49
Radius (P>50% members) 10.1 [arcmin]
  • CN 0.49 Poorly populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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 402 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption 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.

Very close Moderate extinction Low mass Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UPK 402 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 – 87.516 2.822 2.472 -1.112 -1.822 23.075
Li et al. 2025 87.515 2.822 2.385 -1.112 -1.917 –
Alfonso et al. 2024 87.517 2.812 2.431 -1.137 -1.805 –
Hunt & Reffert 2024 87.515 2.9 2.471 -1.105 -1.785 14.811
Celli et al. 2024 87.515 2.822 – – – –
Cavallo et al. 2024 87.522 2.76 2.466 – – –
Hunt & Reffert 2023 87.515 2.9 2.471 -1.105 -1.785 14.811
Qin et al. 2023 87.5 2.91 2.46 -1.05 -1.66 30.19
He et al. 2022 87.509 2.819 2.47 -1.096 -1.809 –
Cantat-Gaudin et al. 2020 87.515 2.822 2.385 -1.112 -1.917 –
Cantat-Gaudin & Anders 2020 87.515 2.822 2.417 -1.154 -1.961 –
Sim et al. 2019 87.507 2.806 – -1.15 -1.96 –

💡 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 0.35 0.69 – 7 -0.145 – – –
Alfonso et al. 2024 0.43 1.26 – 12 0.009 – – –
Hunt & Reffert 2024 – – – – – 42* – –
Celli et al. 2024 – – – 7 – 28 – –
Cavallo et al. 2024 0.45 1.61 – 6 0.160 – – –
Hunt & Reffert 2023 0.39 1.12 1.50 5 – – – –
Qin et al. 2023 0.49 0.46 – 6 – – – –
He et al. 2022 – 0.15 – 3 – – – –
Cantat-Gaudin et al. 2020 0.43 1.26 – 7 – – – –
Cantat-Gaudin & Anders 2020 0.41 – – – – – – –
Sim et al. 2019 0.43 – – 7 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
LISC-III 3646 100.0 87.56 2.64 2.43 -1.16 -1.84 23.07 0.27

💡 Note: The % column shows the percentage of members that UPK 402 shares with each listed object.

Visualization
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UPK 402 UCC
UPK 402 HUNT23
UPK 402 CANTAT20
Galactocentric position diagram