UPK 495

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0.58 UTI
0.45
CN
0.5
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 45
Radius (P>50% members) 22.3 [arcmin]
  • CN 0.45 Poorly populated
  • Cdens 0.5 Moderately dense
  • CC3 0.75 High quality
  • Clit 0.6 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 495 is a poorly populated, moderately dense object of 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 (see Parameters). It is moderately studied in the literature.
Close Low extinction Near-solar metallicity Intermediate age

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

Data
🔍 Search references for UPK 495 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 – 105.769 -40.912 1.531 -2.373 5.705 1.435
Li et al. 2025 105.863 -40.886 1.454 -2.506 5.659 –
Almeida et al. 2025 105.801 -40.856 – – – –
Alfonso et al. 2024 105.541 -40.912 1.505 -2.388 5.927 –
Almeida et al. 2023 105.961 -40.836 – – – –
He et al. 2022 105.689 -40.929 1.535 -2.223 5.701 –
Dias et al. 2021 105.801 -40.856 1.471 -2.501 5.772 1.919
Cantat-Gaudin et al. 2020 105.863 -40.886 1.454 -2.506 5.659 –
Cantat-Gaudin & Anders 2020 105.787 -40.885 1.461 -2.489 5.787 –
Sim et al. 2019 105.697 -40.87 – -2.42 5.67 –

💡 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 0.69 0.32 – 871 -0.045 – – –
Almeida et al. 2025 0.65 0.44 – 929 – 78 – –
Alfonso et al. 2024 0.66 0.05 – 1124 -0.222 – – –
Almeida et al. 2023 0.61 0.26 – 971 -0.201 244* 0.64 –
He et al. 2022 – 0.15 – 891 – – – –
Tarricq et al. 2022 0.65 – – 447 – – – –
Dias et al. 2021 0.65 0.44 – 929 -0.223 – – –
Cantat-Gaudin et al. 2020 0.66 0.05 – 437 – – – –
Cantat-Gaudin & Anders 2020 0.67 – – – – – – –
Sim et al. 2019 0.66 – – 282 – – – –

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

Visualization
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UPK 495 UCC
UPK 495 CANTAT20
Galactocentric position diagram