ESO 123 26

(MWSC 1364)

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0.70 UTI
0.58
CN
0.47
Cdens
0.75
CC3
0.86
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 66
Radius (P>50% members) 19.3 [arcmin]
  • CN 0.58 Moderately populated
  • Cdens 0.47 Loose
  • CC3 0.75 High quality
  • Clit 0.86 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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ESO 123 26 is a moderately populated, loose 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, 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: worst fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for ESO 123 26 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 – 118.19 -60.303 1.055 -3.497 10.973 14.536
Li et al. 2025 118.125 -60.335 1.026 -3.572 10.909 –
Almeida et al. 2025 118.125 -60.335 – – – –
Hunt & Reffert 2024 118.144 -60.376 1.045 -3.498 10.924 13.723
Cavallo et al. 2024 118.29 -60.282 1.052 – – –
Hunt & Reffert 2023 118.144 -60.376 1.045 -3.498 10.924 13.723
Just et al. 2023 118.048 -60.338 – – – –
Dias et al. 2021 118.125 -60.335 1.026 -3.572 10.909 –
Bica et al. 2019 118.13 -60.329 – – – –
Loktin & Popova 2017 118.125 -60.33 – -0.72 6.72 –
Kharchenko et al. 2016 118.048 -60.338 – – – –
Dias et al. 2014 118.125 -60.33 – -2.79 6.44 –
Kharchenko et al. 2013 118.05 -60.34 – -1.26 8.57 –
Piskunov et al. 2008 118.049 -60.36 – – – –
Piskunov et al. 2007 118.049 -60.36 – – – –
Kharchenko et al. 2005 118.05 -60.36 – -1.41 7.56 –
Dias et al. 2002 118.125 -60.33 – -2.8 6.39 –

💡 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 0.89 0.42 – 527 -0.053 – – –
Almeida et al. 2025 0.91 0.45 – 413 – 44 – –
Hunt & Reffert 2024 – – – – – 55* – –
Cavallo et al. 2024 0.97 0.57 – 288 0.340 – – –
Hunt & Reffert 2023 0.90 0.26 0.41 361 – – – –
Just et al. 2023 – – – 339 – 56 – –
Dias et al. 2021 0.91 0.45 – 413 0.065 – – –
Loktin & Popova 2017 0.60 0.39 – 238 – – – –
Kharchenko et al. 2016 0.82 0.40 – 339 – – – –
Kharchenko et al. 2013 0.82 0.40 – 339 – – – –
Piskunov et al. 2008 0.55 0.40 – 214 – 80* – –
Piskunov et al. 2007 0.55 0.40 – 214 – 16 – –
Kharchenko et al. 2005 0.55 0.40 – 214 – – – –
Dias et al. 2002 0.55 0.40 – 214 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 250 90.9 118.18 -60.36 1.05 -3.49 10.95 14.54 0.05

💡 Note: The % column shows the percentage of members that ESO 123 26 shares with each listed object.

Visualization
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ESO 123 26 UCC
ESO 123 26 HUNT23
Galactocentric position diagram