Berkeley 45

(MWSC 3086; OCL 107)

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0.86 UTI
0.79
CN
1.0
Cdens
1.0
CC3
0.74
Clit
1.0
Cdup
Nm (P>50%) 212
Core radius and density 1.1 [pc], 14 [pc-2]
C3 classification AA
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.74 Moderately 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 45 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 high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is moderately studied in the literature.

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

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1323, e_all=0.1213.

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.

Data
πŸ” Search references for Berkeley 45 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 289.779 15.715 0.246 -1.357 -4.577 6.164
Almeida et al. 2025 289.777 15.714 – – – –
Hunt & Reffert 2024 289.775 15.717 0.254 -1.378 -4.587 12.222
Cavallo et al. 2024 289.77 15.713 0.254 – – –
Hunt & Reffert 2023 289.775 15.717 0.254 -1.378 -4.587 12.222
Just et al. 2023 289.774 15.72 – – – –
Jadhav & Subramaniam 2021 289.778 15.716 – – – –
Dias et al. 2021 289.777 15.714 0.224 -1.328 -4.534 –
Cantat-Gaudin et al. 2020 289.778 15.716 0.225 -1.336 -4.534 –
SΓ‘nchez et al. 2020 289.8 15.717 – -1.346 -4.484 –
Cantat-Gaudin & Anders 2020 289.778 15.716 0.225 -1.336 -4.534 –
Soubiran et al. 2018 289.778 15.716 – – – 6.66
Bica et al. 2019 289.782 15.714 – – – –
Cantat-Gaudin et al. 2018 289.778 15.716 0.225 -1.336 -4.534 –
Dias et al. 2018 – – – 4.92 -12.83 –
Sampedro et al. 2017 289.771 15.713 – -0.25 -3.88 –
Kharchenko et al. 2016 289.774 15.72 – – – –
Tadross 2014 289.8 15.717 – – – –
Dias et al. 2014 289.8 15.717 – -0.63 -3.63 –
Kharchenko et al. 2013 289.78 15.722 – 0.12 -3.97 –
Morales et al. 2013 289.8 15.717 – – – –
Bukowiecki et al. 2011 289.779 15.717 – – – –
Dias et al. 2002 289.8 15.717 – 0.12 -3.97 –
Lynga 1987 289.791 15.71 – – – –

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– 3.33 3.25 1.79 589 0.052 1127 – 1
Almeida et al. 2025 3.51 3.05 – 553 – 1127 – –
Hunt & Reffert 2024 3.70 3.63 1.79 228 – 2504(1) – –
Cavallo et al. 2024 3.02 3.99 – 245 -0.170 – – –
Hunt & Reffert 2023 3.70 3.63 1.79 229 – – – –
Just et al. 2023 – – – 724 – 337 – –
Jadhav & Subramaniam 2021 3.33 2.88 – 617 – 1648 – 1(1)
Dias et al. 2021 3.51 3.05 – 553 0.274 – – –
Cantat-Gaudin et al. 2020 3.33 2.88 – 617 – – – –
Kounkel et al. 2020 3.21 3.25 – 589 – – – –
Cantat-Gaudin & Anders 2020 3.94 – – – – – – –
Soubiran et al. 2018 3.94 – – – – – – –
Cantat-Gaudin et al. 2018 3.94 – – – – – – –
Kharchenko et al. 2016 2.36 3.28 – 724 – – – –
Tadross 2014 2.30 2.59 – 600 – – – –
Kharchenko et al. 2013 2.36 3.28 – 724 – – – –
Morales et al. 2013 2.35 – – 355 – – – –
Bukowiecki et al. 2012 – – – – – 378 – –
Bukowiecki et al. 2011 2.69(1) 2.52 – 891 – – – –
Dias et al. 2002 2.35 4.42 – 398 – – – –

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

Visualization
ℹ️
Berkeley 45 UCC
Berkeley 45 HUNT23
Berkeley 45 CANTAT20
Galactocentric position diagram