King 20

(MWSC 3739; OCL 262; FSR 0434; FoF 2071)

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0.91 UTI
0.78
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 184
Radius (P>50% members) 4.1 [arcmin]
  • CN 0.78 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
King 20 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close 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, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for King 20 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 353.317 58.476 0.506 -2.677 -2.646 -31.587
Li et al. 2025 353.305 58.469 0.496 -2.686 -2.585 –
Almeida et al. 2025 353.305 58.473 – – – –
Hunt & Reffert 2024 353.305 58.467 0.499 -2.668 -2.647 –
Cavallo et al. 2024 353.305 58.468 0.504 – – –
Hunt & Reffert 2023 353.305 58.467 0.499 -2.668 -2.647 –
Almeida et al. 2023 353.322 58.472 – – – –
Just et al. 2023 353.318 58.459 – – – –
Rain et al. 2021 353.305 58.469 0.496 -2.686 -2.585 –
Dias et al. 2021 353.305 58.473 0.501 -2.679 -2.592 –
Cantat-Gaudin et al. 2020 353.305 58.469 0.496 -2.686 -2.585 –
SΓ‘nchez et al. 2020 353.312 58.467 – -2.693 -2.584 –
Cantat-Gaudin & Anders 2020 353.305 58.469 0.496 -2.686 -2.585 –
Liu & Pang 2019 353.311 58.475 0.498 -2.698 -2.575 –
Bossini et al. 2019 353.305 58.469 – – – –
Bica et al. 2019 353.307 58.471 – – – –
Cantat-Gaudin et al. 2018 353.305 58.469 0.496 -2.686 -2.585 –
Loktin & Popova 2017 353.31 58.467 – -1.188 3.654 –
Kharchenko et al. 2016 353.318 58.459 – – – –
Dias et al. 2014 353.312 58.467 – -1.24 -0.15 –
Kharchenko et al. 2013 353.325 58.463 – -1.73 5.32 –
Kharchenko et al. 2012 353.325 58.463 – -1.73 5.32 –
Dias et al. 2002 353.312 58.467 – -1.24 -0.15 –

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] Bfr BSS
Li et al. 2025 1.54 2.51 – 162 0.053 – – –
Almeida et al. 2025 1.66 2.51 – 54 – 394 – –
Hunt & Reffert 2024 – – – – – 855* – –
Cavallo et al. 2024 2.05 2.63 – 117 0.540 – – –
Hunt & Reffert 2023 1.84 2.53 1.00 73 – – – –
Almeida et al. 2023 1.71 2.59 – 42 0.113 471* 0.54 –
Just et al. 2023 – – – 445 – 100 – –
Rain et al. 2021 1.90 2.02 – 200 – – – 0
Dias et al. 2021 1.66 2.51 – 54 0.157 – – –
Cantat-Gaudin et al. 2020 1.95 2.06 – 257 – – – –
Cantat-Gaudin & Anders 2020 1.90 – – – – – – –
Liu & Pang 2019 – – – 6 0.500 – – –
Bossini et al. 2019 1.98 2.07 – 349 0.000 – – –
Cantat-Gaudin et al. 2018 1.90 – – – – – – –
Loktin & Popova 2017 1.48 1.74 – 209 – – – –
Kharchenko et al. 2016 1.85 2.17 – 445 – – – –
Kharchenko et al. 2013 1.85 2.17 – 445 – – – –
Kharchenko et al. 2012 1.85 2.17 – 445 – – – –
Dias et al. 2002 1.90 2.02 – 200 – – – –

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

Visualization
ℹ️
King 20 UCC
King 20 HUNT23
King 20 CANTAT20
Galactocentric position diagram