Berkeley 1

(MWSC 20)

Click to load Aladin Lite
0.79 UTI
0.68
CN
0.91
Cdens
0.75
CC3
0.81
Clit
1.0
Cdup
Nm (P>50%) 86
Core radius and density 1.4 [pc], 4.6 [pc-2]
C3 classification AB
  • CN 0.68 Moderately populated
  • Cdens 0.91 Very dense
  • CC3 0.75 High quality
  • Clit 0.81 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 1 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.185, e_all=0.085.

Data
πŸ” Search references for Berkeley 1 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 2.453 60.476 0.229 -2.709 -0.227 -49.212
Almeida et al. 2025 2.445 60.469 – – – –
Hunt & Reffert 2024 2.456 60.471 0.24 -2.707 -0.247 -60.092
Cavallo et al. 2024 2.465 60.477 0.241 – – –
Hunt & Reffert 2023 2.456 60.471 0.24 -2.707 -0.247 -60.092
Almeida et al. 2023 2.454 60.469 – – – –
Just et al. 2023 2.391 60.463 – – – –
Dias et al. 2021 2.445 60.469 0.241 -2.776 -0.18 –
Cantat-Gaudin et al. 2020 2.449 60.476 0.235 -2.758 -0.173 –
SΓ‘nchez et al. 2020 2.4 60.475 – -2.726 -0.101 –
Cantat-Gaudin & Anders 2020 2.449 60.476 0.235 -2.758 -0.173 –
Soubiran et al. 2018 2.449 60.476 – – – -59.97
Cantat-Gaudin et al. 2018 2.449 60.476 0.235 -2.758 -0.173 –
Dias et al. 2018 – – – -2.03 0.24 –
Loktin & Popova 2017 2.4 60.475 – -0.194 -1.944 –
Sampedro et al. 2017 2.4 60.475 – -1.08 0.33 –
Kharchenko et al. 2016 2.391 60.463 – – – –
Tadross 2014 2.4 60.475 – – – –
Dias et al. 2014 2.4 60.475 – -1.83 -0.75 –
Kharchenko et al. 2013 2.4 60.467 – -0.27 -2.3 –
Gozha et al. 2012 2.4 60.475 – – – –
Kharchenko et al. 2012 2.4 60.467 – 0.05 -2.13 –
Bukowiecki et al. 2011 2.442 60.481 – – – –
Dias et al. 2002 2.4 60.475 – -1.83 -0.75 –
Lynga 1987 2.405 60.424 – – – –

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– 3.77 2.05 0.61 398 -0.140 444 0.82 –
Almeida et al. 2025 3.50 2.15 – 15 – 444 – –
Hunt & Reffert 2024 3.77 1.88 0.61 101 – 413(1) – –
Cavallo et al. 2024 2.79 1.78 – 269 -0.270 – – –
Hunt & Reffert 2023 3.77 1.88 0.61 101 – – – –
Almeida et al. 2023 3.54 2.05 – 151 -0.141 617(1) 0.82 –
Just et al. 2023 – – – 398 – 1702 – –
Dias et al. 2021 3.50 2.15 – 15 -0.090 – – –
Cantat-Gaudin et al. 2020 3.78 1.52 – 302 – – – –
Kounkel et al. 2020 3.77 2.05 – 457 – – – –
Cantat-Gaudin & Anders 2020 3.78 – – – – – – –
Soubiran et al. 2018 3.78 – – – – – – –
Cantat-Gaudin et al. 2018 3.78 – – – – – – –
Loktin & Popova 2017 2.23 1.07 – 631 – – – –
Kharchenko et al. 2016 10.30 2.85 – 398 – – – –
Tadross 2014 2.42 2.46 – 400 – – – –
Kharchenko et al. 2013 10.30 2.85 – 398 – – – –
Bukowiecki et al. 2012 – – – – – 226 – –
Gozha et al. 2012 2.42 – – 398 -0.140 – – –
Kharchenko et al. 2012 10.30 2.85 – 398 – – – –
Bukowiecki et al. 2011 3.46(1) 1.70 – 1000 – – – –
Paunzen et al. 2010 – – – – -0.140 – – –
Dias et al. 2002 2.42 2.46 – 398 – – – –

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

Visualization
ℹ️
Berkeley 1 UCC
Berkeley 1 HUNT23
Berkeley 1 CANTAT20
Galactocentric position diagram