King 4

(MWSC 216)

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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%) 177
Radius (P>50% members) 3.0 [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
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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King 4 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near 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 metallicity parameter (see Parameters). It is very well-studied in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for King 4 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 – 39.028 59.027 0.392 -0.597 -0.163 -46.098
Li et al. 2025 39.028 59.024 0.378 -0.575 -0.084 –
Almeida et al. 2025 39.018 59.024 – – – –
Hunt & Reffert 2024 39.026 59.021 0.393 -0.602 -0.183 -45.23
Cavallo et al. 2024 39.024 59.037 0.395 – – –
Hunt & Reffert 2023 39.026 59.021 0.393 -0.602 -0.183 -45.23
Almeida et al. 2023 39.024 59.026 – – – –
Just et al. 2023 39.011 59.023 – – – –
Jaehnig et al. 2021 39.028 59.024 0.416 -0.554 -0.114 –
Rain et al. 2021 39.028 59.024 0.378 -0.575 -0.084 –
Dias et al. 2021 39.018 59.024 0.38 -0.588 -0.041 –
Cantat-Gaudin et al. 2020 39.028 59.024 0.378 -0.575 -0.084 –
Cantat-Gaudin & Anders 2020 39.028 59.024 0.378 -0.575 -0.084 –
Bossini et al. 2019 39.028 59.024 – – – –
Soubiran et al. 2018 39.028 59.024 – – – -44.33
Cantat-Gaudin et al. 2018 39.028 59.024 0.378 -0.575 -0.084 –
Loktin & Popova 2017 39.015 59.025 – -1.055 -0.122 -58.3
Kharchenko et al. 2016 39.011 59.023 – – – –
Dias et al. 2014 38.925 59.0 – 0.52 2.44 –
Kharchenko et al. 2013 39.022 59.025 – -1.74 -0.09 -58.3
Kharchenko et al. 2012 39.022 59.025 – -1.8 -0.06 –
van den Bergh 2006 38.925 59.0 – – – –
Dias et al. 2002 38.925 59.0 – 0.52 2.44 –

💡 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 2.89 2.66 – 181 -0.063 – – –
Almeida et al. 2025 2.13 2.42 – 215 – 504 – –
Hunt & Reffert 2024 – – – – – 1256* – –
Cavallo et al. 2024 2.59 2.56 – 126 0.430 – – –
Hunt & Reffert 2023 2.35 2.42 1.25 146 – – – –
Almeida et al. 2023 2.20 2.54 – 84 -0.112 888* 0.57 –
Just et al. 2023 – – – 160 – 444 – –
Jaehnig et al. 2021 2.40* – – – – – – –
Rain et al. 2021 2.46 2.39 – 44 – – – 0
Dias et al. 2021 2.13 2.42 – 215 -0.042 – – –
Cantat-Gaudin et al. 2020 2.70 2.20 – 100 – – – –
Cantat-Gaudin & Anders 2020 2.46 – – – – – – –
Bossini et al. 2019 3.08 2.41 – 44 0.000 – – –
Soubiran et al. 2018 2.46 – – – – – – –
Cantat-Gaudin et al. 2018 2.46 – – – – – – –
Loktin & Popova 2017 3.13 2.65 – 44 – – – –
Kharchenko et al. 2016 2.80 2.77 – 160 – – – –
Kharchenko et al. 2013 2.80 2.77 – 160 – – – –
Kharchenko et al. 2012 2.80 2.77 – 162 – – – –
van den Bergh 2006 3.17 2.67 – 40 – – – –
Dias et al. 2002 3.17 2.68 – 40 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
FSR 0600 8.5 39.2 59.1 0.38 -0.63 -0.2 – 0.05

💡 Note: The % column shows the percentage of members that King 4 shares with each listed object.

Visualization
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King 4 UCC
King 4 HUNT23
King 4 CANTAT20
Galactocentric position diagram