Berkeley 32

(Biurakan 8; MWSC 1037; OCL 522; FoF 583)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 767
Core radius and density 1.6 [pc], 15 [pc-2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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 32 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

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: 0.98 (50th percentile).

Rain et al. (2024)
Most BSSs lie just above the turnoff, but others span a wide luminosity range, implying diverse binary histories. Both BSSs and YSSs are broadly matched by binary models, though a few faint candidates may be misclassified or require different model parameters.

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1087, e_all=0.1474.

Rain et al. (2021)
The red limit of the straggler area is BP-RP=0.86

Ahumada & Lapasset (2007)
The red limit of the blue straggler area is (B-V)=0.55. Stars 30, 31, and 40 are cited as blue stragglers in (1991AcA....41..167K). Adopted cluster centre: star 16 of (1991AcA....41..167K).

Data
πŸ” Search references for Berkeley 32 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 104.533 6.436 0.277 -0.357 -1.585 105.489
Bijavara Seshashayana et al. 2025 104.514 6.427 – – – –
Otto et al. 2026 104.531 6.433 – -0.34 -1.61 106.2
Li et al. 2025 104.53 6.433 0.28 -0.335 -1.608 –
Hu & Soubiran 2025 104.533 6.437 – – – –
Carrasco-Varela et al. 2025 104.738 6.379 – – – –
Almeida et al. 2025 104.528 6.43 – – – –
Zhang et al. 2024 104.531 6.433 – – – –
Hunt & Reffert 2024 104.531 6.433 0.275 -0.356 -1.59 103.041
Cavallo et al. 2024 104.533 6.437 0.275 – – –
Rain et al. 2024 104.533 6.437 0.276 -0.361 -1.588 –
Hunt & Reffert 2023 104.531 6.433 0.275 -0.356 -1.59 103.041
Just et al. 2023 104.521 6.437 – – – –
Jadhav & Subramaniam 2021 104.53 6.433 – – – –
Jaehnig et al. 2021 104.53 6.433 0.308 -0.345 -1.616 –
Netopil et al. 2022 104.525 6.434 – – – 105.68
Rain et al. 2021 104.53 6.433 0.28 -0.335 -1.608 –
Dias et al. 2021 104.528 6.43 0.282 -0.346 -1.62 106.417
Spina et al. 2021 104.53 6.433 0.283 -0.344 -1.617 –
Cantat-Gaudin et al. 2020 104.53 6.433 0.28 -0.335 -1.608 –
SΓ‘nchez et al. 2020 104.525 6.433 – -0.264 -1.65 –
Zhong et al. 2020 104.53 6.433 – -0.335 -1.608 101.128
Cantat-Gaudin & Anders 2020 104.53 6.433 0.28 -0.335 -1.608 –
Liu & Pang 2019 104.532 6.431 0.289 -0.354 -1.45 –
Soubiran et al. 2018 104.53 6.433 – – – 106.4
Bica et al. 2019 104.529 6.438 – – – –
Cantat-Gaudin et al. 2018 104.53 6.433 0.28 -0.335 -1.608 –
Loktin & Popova 2017 104.52 6.434 – -0.088 -0.698 101.0
Sampedro et al. 2017 104.525 6.433 – -1.27 -1.46 –
Kharchenko et al. 2016 104.521 6.437 – – – –
Netopil et al. 2016 104.525 6.433 – – – –
Dias et al. 2014 104.525 6.433 – -1.41 -0.86 –
Kharchenko et al. 2013 104.527 6.435 – 0.55 -2.32 101.0
Gozha et al. 2012 104.525 6.433 – – – –
Bukowiecki et al. 2011 104.537 6.437 – – – –
Kharchenko et al. 2007 104.52 6.43 – 0.05 – –
Ahumada & Lapasset 2007 104.525 6.433 – – – –
van den Bergh 2006 104.525 6.433 – – – –
Chen et al. 2003 104.52 6.433 – – – –
Dias et al. 2002 104.525 6.433 – -1.41 -0.86 105.2
Lynga 1987 104.52 6.433 – – – –

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– 3.24 0.47 0.71 4853 -0.300 3540 0.29 20
Bijavara Seshashayana et al. 2025 – 0.34 – 4900 -0.290(14) – – –
Otto et al. 2026 – – – 4898 -0.340(15) – – –
Li et al. 2025 3.35 0.58 – 4764 -0.360 – – –
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Carrasco-Varela et al. 2025 3.32 0.55 – 4853 -0.300 – – 14(1)
Almeida et al. 2025 3.32 0.55 – 4853 – 3138 – –
Zhang et al. 2024 – – – – -0.324(1) – – –
Hunt & Reffert 2024 3.22 0.16 0.71 3252 – 3540(1) – –
Cavallo et al. 2024 2.75 0.49 – 5129 -0.160 – – –
Rain et al. 2024 3.20 0.25 – 7026 – 16649 0.29 –
Hunt & Reffert 2023 3.22 0.16 0.71 3251 – – – –
Just et al. 2023 – – – 2818 – 940 – –
Spina et al. 2022 – – – – -0.378 – – –
Jadhav & Subramaniam 2021 3.08 0.34 – 4898 – 5137 – 9(1)
Jaehnig et al. 2021 3.24(1) – – – – – – –
Netopil et al. 2022 3.31(1) – – 5248 -0.300(1) – – –
Rain et al. 2021 3.24 0.47 – 5012 – – – 27
Dias et al. 2021 3.32 0.55 – 4853 -0.280 – – –
Spina et al. 2021 3.37 – – 4898 -0.377(20) – – –
Cantat-Gaudin et al. 2020 3.08 0.34 – 4898 – – – –
Kounkel et al. 2020 3.23 0.55 – 2138 – – – –
Zhong et al. 2020 3.24(1) 0.47 – 9700 -0.340 – – –
Cantat-Gaudin & Anders 2020 3.24 – – – – – – –
Liu & Pang 2019 – – – 4170 0.250 – – –
Soubiran et al. 2018 3.24 – – – – – – –
Cantat-Gaudin et al. 2018 3.24 – – – – – – –
Loktin & Popova 2017 3.01 0.15 – 6310 – – – –
Kharchenko et al. 2016 5.00 0.07 – 2818 – – – –
Netopil et al. 2016 11.19 – – 3850 -0.300(2) – – –
Heiter et al. 2014 – – – – -0.300 – – –
Kharchenko et al. 2013 5.00 0.07 – 2818 -0.290 – – –
Gozha et al. 2012 3.10 – – 3388 -0.290 – – –
Bukowiecki et al. 2011 3.29(1) 0.22 – 3548 – – – –
Paunzen et al. 2010 – – – – -0.420 – – –
Ahumada & Lapasset 2007 – 0.50 – 3388 – – – 37
van den Bergh 2006 3.10 0.50 – 3388 – – – –
Chen et al. 2003 3.10 0.50 – 3380 -0.580(1) – – –
Dias et al. 2002 3.08 0.47 – 5012 -0.290 – – –
Lynga 1987 9.00 – – – – – – –

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

Visualization
ℹ️
Berkeley 32 UCC
Berkeley 32 HUNT23
Berkeley 32 CANTAT20
Galactocentric position diagram