FSR 0441

(SAI 150; MWSC 3752)

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0.82 UTI
0.76
CN
1.0
Cdens
0.75
CC3
0.79
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 0.79 Well-studied
  • Cdup 1.0 Unique
📥 Members 📊 Colab 🔬 Bayestar19 🔍 SciX 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview
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 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 (~2.33 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
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
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 – – – –
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 – – – –
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 – – – –

💡 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.

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
FSR 0441 UCC
FSR 0441 HUNT23
Galactocentric position diagram

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