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
📥 Members 📊 Colab 🔬 Bayestar19 🔍 SciX 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview
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 (~4.55 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
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 –
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 – – – –
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 – – – –

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

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

💡 Note: How are the galactocentric plots generated? See FAQ.