FSR 1125

(SAI 70; MWSC 996)

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0.81 UTI
0.75
CN
0.89
Cdens
0.75
CC3
0.82
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 104
Radius (P>50% members) 2.4 [arcmin]
  • CN 0.75 Rich
  • Cdens 0.89 Dense
  • CC3 0.75 High quality
  • Clit 0.82 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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FSR 1125 is a rich, dense object of high C3 quality. Its parallax locates it at a large* distance, below 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 and mass parameters (see Parameters). It is well-studied in the literature.

(*): The parallax distance estimate (~6.93 kpc) differs significantly from the median photometric distance (~4.81 kpc).

Distant Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 1125 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 – 102.617 -5.444 0.144 -0.238 1.03 48.953
Almeida et al. 2025 102.618 -5.445 – – – –
Hunt & Reffert 2024 102.617 -5.442 0.156 -0.215 1.042 48.947
Cavallo et al. 2024 102.612 -5.446 0.154 – – –
Hunt & Reffert 2023 102.617 -5.442 0.156 -0.215 1.042 48.947
Just et al. 2023 102.578 -5.468 – – – –
Dias et al. 2021 102.618 -5.445 0.097 -0.24 1.038 –
Cantat-Gaudin et al. 2020 102.619 -5.444 0.113 -0.255 1.055 –
Cantat-Gaudin & Anders 2020 102.619 -5.444 0.113 -0.255 1.055 –
Soubiran et al. 2018 102.619 -5.444 – – – 50.44
Bica et al. 2019 102.612 -5.446 – – – –
Cantat-Gaudin et al. 2018 102.619 -5.444 0.113 -0.255 1.055 –
Kharchenko et al. 2016 102.578 -5.468 – – – –
Kharchenko et al. 2013 102.585 -5.47 – 3.0 0.92 –
Glushkova et al. 2010 102.611 -5.436 – – – –
Froebrich et al. 2007 102.617 -5.448 – – – –

💡 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 3.50 1.70 – 1493 – 314 – –
Hunt & Reffert 2024 – – – – – 934* – –
Cavallo et al. 2024 4.29 2.44 – 427 0.050 – – –
Hunt & Reffert 2023 4.81 2.35 1.37 290 – – – –
Just et al. 2023 – – – 40 – 182 – –
Dias et al. 2021 3.50 1.70 – 1493 -0.101 – – –
Cantat-Gaudin et al. 2020 6.70 2.25 – 120 – – – –
Cantat-Gaudin & Anders 2020 7.02 – – – – – – –
Soubiran et al. 2018 7.02 – – – – – – –
Cantat-Gaudin et al. 2018 7.02 – – – – – – –
Kharchenko et al. 2016 2.22 2.58 – 40 – – – –
Kharchenko et al. 2013 2.22 2.58 – 40 – – – –
Glushkova et al. 2010 6.28 1.21 – 1259 – – – –

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

Visualization
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FSR 1125 UCC
FSR 1125 HUNT23
FSR 1125 CANTAT20
Galactocentric position diagram