Ruprecht 41

(MWSC 1378; OCL 673; ESO 493 31; FSR 1318)

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0.90 UTI
0.76
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 122
Radius (P>50% members) 3.2 [arcmin]
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Ruprecht 41 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near 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 metallicity and mass parameters (see Parameters). It is very well-studied in the literature.
Distant Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Ruprecht 41 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 – 118.426 -27.003 0.218 -2.598 3.571 78.43
Li et al. 2025 118.443 -26.992 0.195 -2.593 3.554 –
Hu & Soubiran 2025 118.423 -27.01 – – – –
Almeida et al. 2025 118.437 -26.975 – – – –
Hunt & Reffert 2024 118.424 -27.007 0.227 -2.596 3.572 96.074
Cavallo et al. 2024 118.423 -27.01 0.225 – – –
Hunt & Reffert 2023 118.424 -27.007 0.227 -2.596 3.572 96.074
Almeida et al. 2023 118.439 -26.971 – – – –
Just et al. 2023 118.445 -26.962 – – – –
Dias et al. 2021 118.437 -26.975 0.204 -2.581 3.535 78.563
Cantat-Gaudin et al. 2020 118.443 -26.992 0.195 -2.593 3.554 –
Cantat-Gaudin & Anders 2020 118.443 -26.992 0.195 -2.593 3.554 –
Soubiran et al. 2018 118.443 -26.992 – – – 78.54
Bica et al. 2019 118.441 -26.967 – – – –
Cantat-Gaudin et al. 2018 118.443 -26.992 0.195 -2.593 3.554 –
Kharchenko et al. 2016 118.445 -26.962 – – – –
Dias et al. 2014 118.45 -26.961 – -2.23 2.92 –
Kharchenko et al. 2013 118.45 -26.965 – -2.33 3.91 –
Dias et al. 2002 118.45 -26.961 – -2.23 2.92 –

💡 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
Li et al. 2025 3.66 0.57 – 576 0.132 – – –
Hu & Soubiran 2025 – – – – -0.200* – – –
Almeida et al. 2025 3.41 1.23 – 392 – 444 – –
Hunt & Reffert 2024 – – – – – 811* – –
Cavallo et al. 2024 2.92 1.07 – 550 -0.220 – – –
Hunt & Reffert 2023 3.79 1.10 2.16 289 – – – –
Almeida et al. 2023 3.68 1.30 – 250 -0.114 798* 0.61 –
Just et al. 2023 – – – 733 – 120 – –
Dias et al. 2021 3.41 1.23 – 392 -0.109 – – –
Cantat-Gaudin et al. 2020 4.33 0.98 – 145 – – – –
Cantat-Gaudin & Anders 2020 4.47 – – – – – – –
Soubiran et al. 2018 4.47 – – – – – – –
Cantat-Gaudin et al. 2018 4.47 – – – – – – –
Kharchenko et al. 2016 3.25 0.42 – 733 – – – –
Kharchenko et al. 2013 3.25 0.42 – 733 – – – –
Dias et al. 2002 3.15 0.40 – 692 – – – –

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

Visualization
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Ruprecht 41 UCC
Ruprecht 41 HUNT23
Ruprecht 41 CANTAT20
Galactocentric position diagram