Berkeley 91

(MWSC 3476; OCL 206; FSR 0287)

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0.80 UTI
0.7
CN
1.0
Cdens
0.75
CC3
0.77
Clit
1.0
Cdup
N50 (P>50% members) 89
Stellar density (N50/rad) 43.1 [N/pc2]
C3 classification AB
  • CN 0.7 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.77 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 91 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a large distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is well-studied in the literature.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.18 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.18 (50th percentile).

Data
πŸ” Search references for Berkeley 91 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 317.724 48.54 0.182 -1.611 -3.142 -47.575
Hu & Soubiran 2025 317.713 48.537 – – – –
Hunt & Reffert 2024 317.72 48.542 0.21 -1.675 -3.241 -47.546
Cavallo et al. 2024 317.713 48.537 0.198 – – –
Hunt & Reffert 2023 317.72 48.542 0.21 -1.675 -3.241 -47.546
Just et al. 2023 317.71 48.532 – – – –
Jadhav & Subramaniam 2021 317.711 48.543 – – – –
Cantat-Gaudin et al. 2020 317.711 48.543 0.203 -1.599 -2.927 –
SΓ‘nchez et al. 2020 317.717 48.537 – -1.287 -2.759 –
Donor et al. 2020 317.715 48.535 – -1.56 -3.43 -51.1
Cantat-Gaudin & Anders 2020 317.711 48.543 0.203 -1.599 -2.927 –
Soubiran et al. 2018 317.711 48.543 – – – -45.11
Bica et al. 2019 317.924 48.462 – – – –
Cantat-Gaudin et al. 2018 317.711 48.543 0.203 -1.599 -2.927 –
Loktin & Popova 2017 317.715 48.537 – -0.791 0.163 –
Sampedro et al. 2017 317.717 48.537 – – – –
Kharchenko et al. 2016 317.71 48.532 – – – –
Tadross 2014 317.717 48.537 – – – –
Dias et al. 2014 317.717 48.537 – -3.41 -2.6 –
Kharchenko et al. 2013 317.715 48.535 – -3.97 -0.56 –
Kharchenko et al. 2012 317.715 48.535 – -3.97 -0.56 –
Bukowiecki et al. 2011 317.712 48.539 – – – –
Dias et al. 2002 317.717 48.537 – -3.41 -2.6 –
Lynga 1987 317.934 48.47 – – – –

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– 4.31 3.845 2.61 501 -0.130 1744 – 0
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Hunt & Reffert 2024 – – – – – 1533(1) – –
Cavallo et al. 2024 5.47 3.90 – 977 -0.350 – – –
Hunt & Reffert 2023 4.23 3.46 2.61 1858 – – – –
Just et al. 2023 – – – 251 – 1954 – –
Spina et al. 2022 – – – – 0.090 – – –
Jadhav & Subramaniam 2021 6.05 4.04 – 631 – 2900 – 0(1)
Cantat-Gaudin et al. 2020 6.05 4.04 – 631 – – – –
Kounkel et al. 2020 4.15 3.57 – 372 – – – –
Donor et al. 2020 – – – – 0.090 – – –
Cantat-Gaudin & Anders 2020 4.31 – – – – – – –
Soubiran et al. 2018 4.31 – – – – – – –
Cantat-Gaudin et al. 2018 4.31 – – – – – – –
Loktin & Popova 2017 2.85 1.33 – 1585 – – – –
Kharchenko et al. 2016 9.47 4.10 – 251 – – – –
Tadross 2014 2.40 3.15 – 500 – – – –
Kharchenko et al. 2013 9.47 4.10 – 251 – – – –
Bukowiecki et al. 2012 – – – – – 350 – –
Kharchenko et al. 2012 9.47 4.10 – 251 – – – –
Bukowiecki et al. 2011 2.56(1) 2.52 – 501 – – – –
Dias et al. 2002 4.10 3.79 – 2239 -0.130 – – –

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

Visualization
ℹ️
Berkeley 91 UCC
Berkeley 91 HUNT23
Berkeley 91 CANTAT20
Galactocentric position diagram