ESO 134 12

(MWSC 2248)

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0.87 UTI
0.77
CN
1.0
Cdens
1.0
CC3
0.79
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 153
Radius (P>50% members) 2.5 [arcmin]
  • CN 0.77 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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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ESO 134 12 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near 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 parameter (see Parameters). It is well-studied in the literature.

Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for ESO 134 12 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 – 221.229 -59.154 0.421 -5.248 -3.103 -67.506
Almeida et al. 2025 221.212 -59.154 – – – –
Hunt & Reffert 2024 221.226 -59.154 0.427 -5.266 -3.096 -67.772
Cavallo et al. 2024 221.205 -59.157 0.433 – – –
Hunt & Reffert 2023 221.226 -59.154 0.427 -5.266 -3.096 -67.772
Just et al. 2023 221.185 -59.14 – – – –
Dias et al. 2021 221.212 -59.154 0.417 -5.156 -3.118 –
Cantat-Gaudin et al. 2020 221.22 -59.158 0.415 -5.182 -3.122 –
Cantat-Gaudin & Anders 2020 221.22 -59.158 0.415 -5.182 -3.122 –
Bica et al. 2019 221.192 -59.169 – – – –
Cantat-Gaudin et al. 2018 221.22 -59.158 0.415 -5.182 -3.122 –
Kharchenko et al. 2016 221.185 -59.14 – – – –
Dias et al. 2014 221.192 -59.165 – -2.95 -4.04 –
Kharchenko et al. 2013 221.197 -59.142 – -5.35 0.65 –
Dias et al. 2002 221.192 -59.165 – -2.95 -4.04 –

💡 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 2.18 2.82 – 13 – 544 – –
Hunt & Reffert 2024 – – – – – 874* – –
Cavallo et al. 2024 2.25 2.57 – 407 0.520 – – –
Hunt & Reffert 2023 2.07 2.98 2.49 148 – – – –
Just et al. 2023 – – – 794 – 323 – –
Dias et al. 2021 2.18 2.82 – 13 0.072 – – –
Cantat-Gaudin et al. 2020 2.42 2.53 – 151 – – – –
Cantat-Gaudin & Anders 2020 2.25 – – – – – – –
Cantat-Gaudin et al. 2018 2.25 – – – – – – –
Kharchenko et al. 2016 2.09 2.90 – 794 – – – –
Kharchenko et al. 2013 2.09 2.90 – 794 – – – –
Dias et al. 2002 2.09 2.90 – 794 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0617 26.8 221.22 -59.16 0.45 -5.25 -3.1 -102.8 0.0

💡 Note: The % column shows the percentage of members that ESO 134 12 shares with each listed object.

Visualization
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ESO 134 12 UCC
ESO 134 12 HUNT23
ESO 134 12 CANTAT20
Galactocentric position diagram