Berkeley 8

(FSR 0545; MWSC 158; OCL 323; FoF 652)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 761
Radius (P>50% members) 4.4 [arcmin]
  • 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
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Berkeley 8 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, well above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old 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.
Distant Moderate extinction Massive Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Berkeley 8 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 30.292 75.486 0.282 2.652 0.375 -28.826
Hu & Soubiran 2025 30.309 75.478 – – – –
Almeida et al. 2025 30.308 75.48 – – – –
Hunt & Reffert 2024 30.297 75.491 0.285 2.664 0.375 -29.159
Cavallo et al. 2024 30.309 75.478 0.278 – – –
Hunt & Reffert 2023 30.297 75.491 0.285 2.664 0.375 -29.159
Almeida et al. 2023 30.306 75.481 – – – –
Just et al. 2023 30.337 75.491 – – – –
Dias et al. 2021 30.308 75.48 0.244 2.667 0.429 -28.168
Cantat-Gaudin et al. 2020 30.306 75.489 0.25 2.65 0.439 –
Cantat-Gaudin & Anders 2020 30.306 75.489 0.25 2.65 0.439 –
Liu & Pang 2019 30.276 75.472 0.277 2.656 0.467 –
Soubiran et al. 2018 30.306 75.489 – – – -27.88
Bica et al. 2019 30.228 75.484 – – – –
Cantat-Gaudin et al. 2018 30.306 75.489 0.25 2.65 0.439 –
Loktin & Popova 2017 30.27 75.483 – 2.113 -2.203 –
Kharchenko et al. 2016 30.337 75.491 – – – –
Dias et al. 2014 30.275 75.483 – 0.99 -3.08 –
Kharchenko et al. 2013 30.352 75.493 – 1.73 -1.85 –
Kharchenko et al. 2012 30.352 75.493 – 1.62 -1.82 –
Froebrich et al. 2007 30.296 75.487 – – – –
Dias et al. 2002 30.275 75.483 – 0.99 -3.08 –

💡 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] Bfr BSS
Hu & Soubiran 2025 – – – – 0.000* – – –
Almeida et al. 2025 3.20 2.08 – 3499 – 3259 – –
Hunt & Reffert 2024 – – – – – 4347* – –
Cavallo et al. 2024 3.01 2.44 – 2512 -0.420 – – –
Hunt & Reffert 2023 3.28 1.99 1.58 1923 – – – –
Almeida et al. 2023 3.01 2.21 – 3365 -0.175 1073* 0.83 –
Just et al. 2023 – – – 1995 – 8831 – –
Dias et al. 2021 3.20 2.08 – 3499 -0.077 – – –
Cantat-Gaudin et al. 2020 3.34 1.75 – 3631 – – – –
Cantat-Gaudin & Anders 2020 3.58 – – – – – – –
Liu & Pang 2019 – – – 1660 -0.250 – – –
Soubiran et al. 2018 3.58 – – – – – – –
Cantat-Gaudin et al. 2018 3.58 – – – – – – –
Loktin & Popova 2017 2.30 2.51 – 1202 – – – –
Kharchenko et al. 2016 5.00 1.24 – 1995 – – – –
Kharchenko et al. 2013 5.00 1.24 – 1995 – – – –
Kharchenko et al. 2012 5.00 1.24 – 1995 – – – –
Dias et al. 2002 3.15 2.33 – 3162 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization
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Berkeley 8 UCC
Berkeley 8 HUNT23
Berkeley 8 CANTAT20
Galactocentric position diagram