UPK 578

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0.78 UTI
0.57
CN
1.0
Cdens
0.75
CC3
0.79
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 64
Radius (P>50% members) 7.8 [arcmin]
  • CN 0.57 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.79 Well-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 578 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 low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is well-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 578 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 – 192.967 -57.372 1.063 -12.957 -4.569 -2.684
Li et al. 2025 192.965 -57.367 1.045 -12.913 -4.654 –
Hu & Soubiran 2025 192.902 -57.396 – – – –
Almeida et al. 2025 192.909 -57.402 – – – –
Alfonso et al. 2024 193.03 -57.369 1.016 -12.961 -4.609 –
Hunt & Reffert 2024 193.001 -57.374 1.06 -12.948 -4.575 -3.248
Cavallo et al. 2024 192.902 -57.396 1.061 – – –
Hunt & Reffert 2023 193.001 -57.374 1.06 -12.948 -4.575 -3.248
Almeida et al. 2023 192.837 -57.407 – – – –
He et al. 2022 192.999 -57.373 1.055 -12.961 -4.609 –
Tarricq et al. 2022 193.027 -57.367 1.048 -12.964 -4.588 –
Dias et al. 2021 192.909 -57.402 1.05 -12.916 -4.635 -1.257
Cantat-Gaudin et al. 2020 192.965 -57.367 1.045 -12.913 -4.654 –
Cantat-Gaudin & Anders 2020 192.965 -57.367 1.04 -12.89 -4.599 –
Sim et al. 2019 192.93 -57.382 – -12.93 -4.67 –

💡 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 1.09 1.12 – 640 0.012 – – –
Hu & Soubiran 2025 – – – – -0.160* – – –
Almeida et al. 2025 0.91 0.73 – 845 – 107 – –
Alfonso et al. 2024 0.96 0.70 – 733 0.145 – – –
Hunt & Reffert 2024 – – – – – 116* – –
Cavallo et al. 2024 0.91 0.84 – 776 0.270 – – –
Hunt & Reffert 2023 0.90 0.73 0.57 552 – – – –
Almeida et al. 2023 0.91 0.88 – 805 0.100 155* 0.65 –
He et al. 2022 – 1.30 – 501 – – – –
Tarricq et al. 2022 0.93 – – 871 – – – –
Dias et al. 2021 0.91 0.73 – 845 0.145 – – –
Cantat-Gaudin et al. 2020 0.95 0.70 – 871 – – – –
Cantat-Gaudin & Anders 2020 0.94 – – – – – – –
Sim et al. 2019 0.94 – – 708 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 14466 96.9 192.97 -57.37 1.06 -12.96 -4.57 -2.68 0.01

💡 Note: The % column shows the percentage of members that UPK 578 shares with each listed object.

Visualization
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UPK 578 UCC
UPK 578 HUNT23
UPK 578 CANTAT20
Galactocentric position diagram