Berkeley 27

(MWSC 999; Biurakan 11; OCL 521)

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0.86 UTI
0.79
CN
1.0
Cdens
0.75
CC3
0.87
Clit
1.0
Cdup
N50 (P>50% members) 205
Stellar density (N50/rad) 31.0 [N/pc2]
C3 classification AB
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.87 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 27 is a rich, very dense object of 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, old cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

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

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Berkeley 27 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 102.841 5.769 0.215 -1.082 0.158 86.768
Li et al. 2025 102.837 5.772 0.19 -1.091 0.147 –
Hu & Soubiran 2025 102.847 5.768 – – – –
Almeida et al. 2025 102.84 5.775 – – – –
Hunt & Reffert 2024 102.837 5.768 0.215 -1.108 0.165 79.332
Cavallo et al. 2024 102.847 5.768 0.216 – – –
Hunt & Reffert 2023 102.837 5.768 0.215 -1.108 0.165 79.332
Just et al. 2023 102.832 5.764 – – – –
Dias et al. 2021 102.84 5.775 0.194 -1.096 0.17 –
Cantat-Gaudin et al. 2020 102.837 5.772 0.19 -1.091 0.147 –
SΓ‘nchez et al. 2020 102.838 5.769 – -1.184 0.3 –
Cantat-Gaudin & Anders 2020 102.837 5.772 0.19 -1.091 0.147 –
Bica et al. 2019 102.838 5.774 – – – –
Cantat-Gaudin et al. 2018 102.837 5.772 0.19 -1.091 0.147 –
Kharchenko et al. 2016 102.832 5.764 – – – –
Dias et al. 2014 102.825 5.767 – 1.21 -4.13 –
Kharchenko et al. 2013 102.84 5.763 – -4.2 -1.52 –
Dias et al. 2002 102.838 5.769 – -4.2 -1.52 –

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– 4.56 1.2 0.84 1995 -0.235 442 – –
Li et al. 2025 4.34 1.20 – 2131 -0.000 – – –
Hu & Soubiran 2025 – – – – -0.260(5) – – –
Almeida et al. 2025 4.16 1.24 – 2858 – 799 – –
Hunt & Reffert 2024 – – – – – 442(1) – –
Cavallo et al. 2024 3.28 1.69 – 1995 -0.760 – – –
Hunt & Reffert 2023 3.83 1.09 0.84 532 – – – –
Just et al. 2023 – – – 1995 – 157 – –
Dias et al. 2021 4.16 1.24 – 2858 -0.211 – – –
Cantat-Gaudin et al. 2020 4.83 1.23 – 1698 – – – –
Cantat-Gaudin & Anders 2020 4.56 – – – – – – –
Cantat-Gaudin et al. 2018 4.56 – – – – – – –
Kharchenko et al. 2016 5.04 0.84 – 1995 – – – –
Kharchenko et al. 2013 5.04 0.84 – 1995 – – – –
Dias et al. 2002 5.04 0.16 – 1995 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0344 12.7 102.83 5.77 0.26 -1.09 0.16 80.3 0.0

πŸ’‘ Note: The % column shows the percentage of members that Berkeley 27 shares with each listed object.

Visualization
ℹ️
Berkeley 27 UCC
Berkeley 27 HUNT23
Berkeley 27 CANTAT20
Galactocentric position diagram