Berkeley 65

(MWSC 221)

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0.82 UTI
0.57
CN
1.0
Cdens
0.5
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 65
Stellar density (N50/rad) 53.7 [N/pc2]
C3 classification BB
  • CN 0.57 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.5 Intermediate quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Berkeley 65 is a moderately populated, very dense object of intermediate 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, very young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

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

Data
🔍 Search references for Berkeley 65 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 99999– 39.766 60.403 0.449 -0.72 -0.399 -60.43
Almeida et al. 2025 39.764 60.411 – – – –
Hunt & Reffert 2024 39.766 60.4 0.449 -0.714 -0.427 -60.428
Cavallo et al. 2024 39.771 60.422 0.45 – – –
Hunt & Reffert 2023 39.766 60.4 0.449 -0.714 -0.427 -60.428
Just et al. 2023 39.737 60.398 – – – –
Jaehnig et al. 2021 39.769 60.403 0.476 -0.692 -0.368 –
Rain et al. 2021 39.768 60.403 0.444 -0.7 -0.337 –
Dias et al. 2021 39.764 60.411 0.441 -0.706 -0.303 –
Cantat-Gaudin et al. 2020 39.768 60.403 0.444 -0.7 -0.337 –
Cantat-Gaudin & Anders 2020 39.768 60.403 0.444 -0.7 -0.337 –
Cantat-Gaudin et al. 2018 39.768 60.403 0.444 -0.7 -0.337 –
Loktin & Popova 2017 39.75 60.418 – 0.436 -3.244 –
Kharchenko et al. 2016 39.737 60.398 – – – –
Dias et al. 2014 39.75 60.417 – -1.47 -2.65 –
Kharchenko et al. 2013 39.75 60.4 – 0.12 -2.57 –
Kharchenko et al. 2012 39.75 60.4 – 0.12 -2.57 –
Bukowiecki et al. 2011 39.775 60.399 – – – –
van den Bergh 2006 39.75 60.417 – – – –
Dias et al. 2002 39.75 60.417 – -1.47 -2.65 –

💡 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] Bfrac BSS
UCC 99999– 2.24 3.37 1.48 13 0.021 442 – 0.0
Almeida et al. 2025 2.21 2.90 – 10 – 340 – –
Hunt & Reffert 2024 – – – – – 543(1) – –
Cavallo et al. 2024 2.41 2.88 – 12 0.200 – – –
Hunt & Reffert 2023 2.07 2.78 1.48 17 – – – –
Just et al. 2023 – – – 16 – 137 – –
Jaehnig et al. 2021 2.11(1) – – – – – – –
Rain et al. 2021 2.11 3.47 – 10 – – – 0
Dias et al. 2021 2.21 2.90 – 10 -0.159 – – –
Cantat-Gaudin et al. 2020 2.28 2.49 – 98 – – – –
Cantat-Gaudin & Anders 2020 2.11 – – – – – – –
Cantat-Gaudin et al. 2018 2.11 – – – – – – –
Loktin & Popova 2017 2.17 3.37 – 14 – – – –
Kharchenko et al. 2016 2.50 3.41 – 16 – – – –
Kharchenko et al. 2013 2.50 3.41 – 16 – – – –
Bukowiecki et al. 2012 – – – – – 699 – –
Kharchenko et al. 2012 2.50 3.41 – 16 – – – –
Bukowiecki et al. 2011 2.98(1) 2.85 – 8 – – – –
van den Bergh 2006 2.27 3.47 – 10 – – – –
Dias et al. 2002 2.27 3.48 – 10 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 10668 4.6 39.85 60.77 0.39 -0.56 -0.34 -41.75 0.03

💡 Note: The % column shows the percentage of members that Berkeley 65 shares with each listed object.

Visualization
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Berkeley 65 UCC
Berkeley 65 HUNT23
Berkeley 65 CANTAT20
Galactocentric position diagram