FSR 0401

(MWSC 3686)

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0.83 UTI
0.73
CN
1.0
Cdens
0.75
CC3
0.82
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 96
Radius (P>50% members) 2.8 [arcmin]
  • CN 0.73 Moderately populated
  • Cdens 1.0 Very 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 0401 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is well-studied in the literature.

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

Distant High extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: worst fit. Isochrone match: intermediate fit.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 0401 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 – 345.242 59.704 0.281 -3.851 -2.694 -59.206
Almeida et al. 2025 345.243 59.704 – – – –
Hunt & Reffert 2024 345.242 59.697 0.267 -3.839 -2.686 -59.755
Cavallo et al. 2024 345.268 59.699 0.266 – – –
Hunt & Reffert 2023 345.242 59.697 0.267 -3.839 -2.686 -59.755
Just et al. 2023 345.24 59.702 – – – –
Dias et al. 2021 345.243 59.704 0.234 -3.839 -2.639 –
Cantat-Gaudin et al. 2020 345.245 59.698 0.23 -3.837 -2.652 –
Cantat-Gaudin & Anders 2020 345.245 59.698 0.23 -3.837 -2.652 –
Bica et al. 2019 345.224 59.706 – – – –
Cantat-Gaudin et al. 2018 345.245 59.698 0.23 -3.837 -2.652 –
Kharchenko et al. 2016 345.24 59.702 – – – –
Kharchenko et al. 2013 345.247 59.705 – -6.9 2.6 –
Kharchenko et al. 2012 345.247 59.705 – -6.9 2.6 –
Froebrich et al. 2007 345.229 59.705 – – – –
Dias et al. 2002 345.229 59.705 – -1.1 -0.96 –

💡 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 4.14 3.05 – 592 – 113 – –
Hunt & Reffert 2024 – – – – – 633* – –
Cavallo et al. 2024 3.53 3.53 – 229 0.200 – – –
Hunt & Reffert 2023 3.62 3.52 1.26 198 – – – –
Just et al. 2023 – – – 398 – 328 – –
Dias et al. 2021 4.14 3.05 – 592 0.089 – – –
Cantat-Gaudin et al. 2020 3.91 3.22 – 269 – – – –
Cantat-Gaudin & Anders 2020 3.87 – – – – – – –
Cantat-Gaudin et al. 2018 3.87 – – – – – – –
Kharchenko et al. 2016 3.21 3.55 – 398 – – – –
Kharchenko et al. 2013 3.21 3.55 – 398 – – – –
Kharchenko et al. 2012 3.21 3.55 – 398 – – – –
Dias et al. 2002 3.21 3.55 – 398 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
HSC 860 11.5 345.35 59.67 0.32 -4.0 -2.82 – 0.04

💡 Note: The % column shows the percentage of members that FSR 0401 shares with each listed object.

Visualization
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FSR 0401 UCC
FSR 0401 HUNT23
FSR 0401 CANTAT20
Galactocentric position diagram