Berkeley 71

(FSR 0810; MWSC 634; OCL 449)

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0.96 UTI
0.78
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 169
Core radius and density 1.7 [pc], 6.3 [pc-2]
C3 classification AA
  • CN 0.78 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Berkeley 71 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above 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.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1379, e_all=0.0689.

Data
πŸ” Search references for Berkeley 71 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 85.237 32.277 0.246 0.652 -1.671 -10.755
Otto et al. 2026 85.242 32.273 – 0.65 -1.61 -9.4
Li et al. 2025 85.233 32.272 0.226 0.65 -1.614 –
Guerco et al. 2025 85.2 32.3 0.26 0.65 -1.67 -9.44
Hu & Soubiran 2025 85.234 32.283 – – – –
Almeida et al. 2025 85.223 32.279 – – – –
Zhang et al. 2024 85.242 32.273 – – – –
Hunt & Reffert 2024 85.242 32.273 0.238 0.631 -1.657 -8.45
Cavallo et al. 2024 85.234 32.283 0.235 – – –
Hunt & Reffert 2023 85.242 32.273 0.238 0.631 -1.657 -8.45
Just et al. 2023 85.229 32.267 – – – –
Jadhav & Subramaniam 2021 85.233 32.272 – – – –
Netopil et al. 2022 85.233 32.273 – – – -6.13
Dias et al. 2021 85.223 32.279 0.222 0.653 -1.606 –
Spina et al. 2021 85.233 32.268 0.213 0.674 -1.623 –
Cantat-Gaudin et al. 2020 85.233 32.272 0.226 0.65 -1.614 –
SΓ‘nchez et al. 2020 85.229 32.278 – 0.549 -1.554 –
Donor et al. 2020 85.237 32.266 – 0.69 -1.66 -9.4
Zhong et al. 2020 85.233 32.272 – 0.65 -1.614 -14.364
Cantat-Gaudin & Anders 2020 85.233 32.272 0.226 0.65 -1.614 –
Soubiran et al. 2018 85.233 32.272 – – – -26.7
Bica et al. 2019 85.222 32.28 – – – –
Cantat-Gaudin et al. 2018 85.233 32.272 0.226 0.65 -1.614 –
Dias et al. 2018 – – – 1.22 -2.98 –
Loktin & Popova 2017 85.23 32.278 – 0.533 -1.867 –
Sampedro et al. 2017 85.229 32.278 – 0.35 -4.13 –
Kharchenko et al. 2016 85.229 32.267 – – – –
Dias et al. 2014 85.229 32.278 – -0.23 -3.55 –
Kharchenko et al. 2013 85.237 32.266 – 2.28 -6.33 –
Kharchenko et al. 2012 85.237 32.266 – 2.28 -6.33 –
Bukowiecki et al. 2011 85.242 32.26 – – – –
Glushkova et al. 2010 85.236 32.276 – – – –
Froebrich et al. 2007 85.237 32.271 – – – –
Dias et al. 2002 85.229 32.278 – -0.23 -3.55 –
Lynga 1987 85.321 32.391 – – – –

πŸ’‘ 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– 3.52 2.74 2.25 871 -0.230 992 – 0
Otto et al. 2026 – – – 871 -0.250(15) – – –
Li et al. 2025 3.15 3.00 – 938 -0.181 – – –
Guerco et al. 2025 – – – 870 -0.250 – – –
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Almeida et al. 2025 3.31 3.10 – 566 – 627 – –
Zhang et al. 2024 – – – – -0.231(1) – – –
Hunt & Reffert 2024 3.52 3.02 2.25 370 – 2358(1) – –
Cavallo et al. 2024 3.48 3.48 – 525 0.100 – – –
Hunt & Reffert 2023 3.52 3.02 2.25 370 – – – –
Just et al. 2023 – – – 1047 – 200 – –
Spina et al. 2022 – – – – -0.230 – – –
Jadhav & Subramaniam 2021 3.60 2.53 – 871 – 1098 – 0(1)
Netopil et al. 2022 3.60(1) – – 871 -0.230(1) – – –
Dias et al. 2021 3.31 3.10 – 566 -0.188 – – –
Spina et al. 2021 4.13 – – 871 -0.203(20) – – –
Cantat-Gaudin et al. 2020 3.60 2.53 – 871 – – – –
Kounkel et al. 2020 3.78 2.61 – 871 – – – –
Donor et al. 2020 – – – – -0.230 – – –
Zhong et al. 2020 3.93(1) 2.74 – 9020 -0.276 – – –
Cantat-Gaudin & Anders 2020 3.93 – – – – – – –
Soubiran et al. 2018 3.93 – – – – – – –
Cantat-Gaudin et al. 2018 3.93 – – – – – – –
Loktin & Popova 2017 5.42 3.20 – 550 – – – –
Kharchenko et al. 2016 3.26 2.74 – 1047 – – – –
Kharchenko et al. 2013 3.26 2.74 – 1047 – – – –
Bukowiecki et al. 2012 – – – – – 992 – –
Kharchenko et al. 2012 3.26 2.74 – 1047 – – – –
Bukowiecki et al. 2011 2.47(1) 2.71 – 891 – – – –
Glushkova et al. 2010 2.45 2.87 – 631 – – – –
Dias et al. 2002 3.26 2.56 – 1000 – – – –

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

Visualization
ℹ️
Berkeley 71 UCC
Berkeley 71 HUNT23
Berkeley 71 CANTAT20
Galactocentric position diagram