UPK 178

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0.74 UTI
0.55
CN
1.0
Cdens
0.75
CC3
0.7
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 59
Radius (P>50% members) 6.2 [arcmin]
  • CN 0.55 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 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 178 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, above 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 age and metallicity parameters (see Parameters). It is moderately studied in the literature.
Close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for UPK 178 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 – 334.469 60.086 1.045 -4.279 -3.386 -24.756
Almeida et al. 2025 334.438 60.084 – – – –
Alfonso et al. 2024 334.479 60.071 1.015 -4.274 -3.413 –
Hunt & Reffert 2024 334.45 60.08 1.048 -4.288 -3.394 -20.199
Cavallo et al. 2024 334.431 60.097 1.042 – – –
Hunt & Reffert 2023 334.45 60.08 1.048 -4.288 -3.394 -20.199
Almeida et al. 2023 334.45 60.071 – – – –
He et al. 2022 334.433 60.079 1.042 -4.294 -3.421 –
Tarricq et al. 2022 334.507 60.065 1.053 -4.298 -3.422 –
Dias et al. 2021 334.438 60.084 1.04 -4.314 -3.372 –
Cantat-Gaudin et al. 2020 334.479 60.071 1.039 -4.297 -3.322 –
Cantat-Gaudin & Anders 2020 334.462 60.069 1.035 -4.356 -3.314 –
Sim et al. 2019 334.458 60.077 – -4.34 -3.36 –

💡 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 0.91 2.33 – 148 – 74 – –
Alfonso et al. 2024 0.96 1.80 – 225 0.019 – – –
Hunt & Reffert 2024 – – – – – 232* – –
Cavallo et al. 2024 1.01 2.49 – 110 0.350 – – –
Hunt & Reffert 2023 0.92 2.42 1.30 125 – – – –
Almeida et al. 2023 0.92 2.27 – 151 0.120 132* 0.76 –
He et al. 2022 – 2.75 – 40 – – – –
Tarricq et al. 2022 0.94 – – 224 – – – –
Dias et al. 2021 0.91 2.33 – 148 0.019 – – –
Cantat-Gaudin et al. 2020 0.96 1.80 – 204 – – – –
Cantat-Gaudin & Anders 2020 0.94 – – – – – – –
Sim et al. 2019 0.95 – – 316 – – – –

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

Visualization
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UPK 178 UCC
UPK 178 HUNT23
UPK 178 CANTAT20
Galactocentric position diagram