FSR 0441

(SAI 150; MWSC 3752)

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0.83 UTI
0.76
CN
1.0
Cdens
0.75
CC3
0.82
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 128
Radius (P>50% members) 3.9 [arcmin]
  • CN 0.76 Rich
  • 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 0441 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate* 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, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

(*): The parallax distance estimate (~3.75 kpc) differs significantly from the median photometric distance (~2.71 kpc).

Note: This object shares a significant 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: intermediate fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 0441 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 – 355.52 58.54 0.267 -2.026 -1.235 -73.692
Almeida et al. 2025 355.541 58.548 – – – –
Hunt & Reffert 2024 355.508 58.543 0.266 -2.007 -1.252 -73.691
Cavallo et al. 2024 355.543 58.54 0.264 – – –
Hunt & Reffert 2023 355.508 58.543 0.266 -2.007 -1.252 -73.691
Almeida et al. 2023 355.54 58.546 – – – –
Just et al. 2023 355.495 58.541 – – – –
Dias et al. 2021 355.541 58.548 0.238 -2.047 -1.153 –
Bica et al. 2019 355.533 58.552 – – – –
Kharchenko et al. 2016 355.495 58.541 – – – –
Dias et al. 2014 355.538 58.553 – 1.29 -1.24 –
Kharchenko et al. 2013 355.503 58.545 – -0.03 -1.2 –
Kharchenko et al. 2012 355.503 58.545 – -0.03 -1.2 –
Glushkova et al. 2010 355.495 58.541 – – – –
Froebrich et al. 2007 355.538 58.553 – – – –
Dias et al. 2002 355.538 58.553 – -0.03 -1.2 –

💡 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 3.47 2.42 – 12 – 415 – –
Hunt & Reffert 2024 – – – – – 1037* – –
Cavallo et al. 2024 3.65 2.39 – 135 0.460 – – –
Hunt & Reffert 2023 3.40 2.49 1.95 121 – – – –
Almeida et al. 2023 3.09 2.40 – 60 -0.094 379* 0.70 –
Just et al. 2023 – – – 447 – 63 – –
Dias et al. 2021 3.47 2.42 – 12 -0.153 – – –
Kharchenko et al. 2016 2.00 1.62 – 447 – – – –
Kharchenko et al. 2013 2.00 1.62 – 447 – – – –
Kharchenko et al. 2012 2.00 1.62 – 447 – – – –
Glushkova et al. 2010 2.33 2.42 – 355 – – – –
Dias et al. 2002 2.00 1.62 – 447 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 401 52.3 355.55 58.54 0.27 -2.03 -1.24 – 0.0

💡 Note: The % column shows the percentage of members that FSR 0441 shares with each listed object.

Visualization
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FSR 0441 UCC
FSR 0441 HUNT23
Galactocentric position diagram