UPK 429

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0.61 UTI
0.71
CN
0.48
Cdens
1.0
CC3
0.42
Clit
1.0
Cdup
Nm (P>50%) 92
Core radius and density 1.7 [pc], 2.4 [pc-2]
C3 classification AA
  • CN 0.71 Moderately populated
  • Cdens 0.48 Loose
  • CC3 1.0 Very high quality
  • Clit 0.42 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
UPK 429 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a close distance, above 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 absorption parameter (see Parameters). It is poorly studied in the literature.

Malhotra et al. (2026)
Lowest/Highest stellar mass in the catalogue with a mass-ratio estimate: 0.5/2.0 Msun

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg60' along with UPK 431.

Data
🔍 Search references for UPK 429 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– 108.92 -0.833 1.135 -1.976 0.079 13.983
Malhotra et al. 2026 108.915 -0.85 – – – –
Li et al. 2025 108.961 -0.875 1.122 -2.045 0.071 –
Almeida et al. 2025 108.962 -0.929 – – – –
Alfonso et al. 2024 108.899 -0.833 1.064 -1.952 0.097 –
Zhang et al. 2024 108.934 -0.82 – – – –
Hunt & Reffert 2024 108.934 -0.82 1.117 -1.94 0.095 13.436
Cavallo et al. 2024 108.91 -0.799 1.118 – – –
Hunt & Reffert 2023 108.934 -0.82 1.117 -1.94 0.095 13.436
Almeida et al. 2023 108.942 -0.989 – – – –
He et al. 2022 108.937 -0.848 1.135 -1.97 0.077 –
Tarricq et al. 2022 108.953 -0.825 1.137 -1.973 0.063 –
Dias et al. 2021 108.962 -0.929 1.122 -2.102 0.095 8.805
Cantat-Gaudin et al. 2020 108.961 -0.875 1.122 -2.045 0.071 –
Cantat-Gaudin & Anders 2020 108.961 -0.884 1.124 -2.066 0.083 –
Sim et al. 2019 108.935 -0.818 – -2.01 0.07 –

💡 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– 0.87 0.12 0.38 168 -0.020 225 0.6 –
Malhotra et al. 2026 0.88 0.12 – 259 0.018 – – –
Li et al. 2025 0.99 0.14 – 236 0.044 – – –
Almeida et al. 2025 0.87 0.26 – 177 – 187 – –
Alfonso et al. 2024 0.90 0.09 – 150 -0.020 – – –
Zhang et al. 2024 – – – – 0.016(1) – – –
Hunt & Reffert 2024 0.83 0.12 0.38 168 – 225(1) – –
Cavallo et al. 2024 0.88 0.40 – 234 -0.160 – – –
Hunt & Reffert 2023 0.83 0.12 0.38 168 – – – –
Almeida et al. 2023 0.85 0.01 – 100 -0.068 362(1) 0.60 –
He et al. 2022 – 0.45 – 79 – – – –
Tarricq et al. 2022 0.88 – – 145 – – – –
Dias et al. 2021 0.87 0.26 – 177 -0.020 – – –
Cantat-Gaudin et al. 2020 0.90 0.09 – 141 – – – –
Cantat-Gaudin & Anders 2020 0.87 – – – – – – –
Sim et al. 2019 0.86 – – 89 – – – –

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

Visualization
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UPK 429 UCC
UPK 429 HUNT23
UPK 429 CANTAT20
Galactocentric position diagram