King 6

(MWSC 277; FoF 2321)

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0.98 UTI
0.89
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 475
Radius (P>50% members) 9.9 [arcmin]
  • CN 0.89 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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
ℹī¸
King 6 is a rich, very dense object of very high C3 quality. Its parallax locates it at a close 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 age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.
Close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for King 6 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 51.99 56.446 1.377 3.825 -1.905 -21.763
Li et al. 2025 51.982 56.444 1.346 3.864 -1.814 –
Wei et al. 2025 51.98 56.448 1.382 3.827 -1.899 –
Almeida et al. 2025 51.984 56.439 – – – –
Alfonso et al. 2024 51.975 56.446 1.346 3.827 -1.894 –
Zhang et al. 2024 52.002 56.449 – – – –
Hunt & Reffert 2024 52.002 56.449 1.376 3.825 -1.91 -21.894
Cavallo et al. 2024 51.969 56.461 1.377 – – –
Hunt & Reffert 2023 52.002 56.449 1.376 3.825 -1.91 -21.894
Almeida et al. 2023 51.998 56.427 – – – –
Just et al. 2023 52.001 56.463 – – – –
He et al. 2022 51.993 56.443 1.38 3.826 -1.905 –
Jaehnig et al. 2021 51.973 56.438 1.378 3.86 -1.823 –
Rain et al. 2021 51.982 56.444 1.346 3.864 -1.814 –
Dias et al. 2021 51.984 56.439 1.338 3.88 -1.825 -22.136
Cantat-Gaudin et al. 2020 51.982 56.444 1.346 3.864 -1.814 –
Cantat-Gaudin & Anders 2020 51.982 56.444 1.346 3.864 -1.814 –
Liu & Pang 2019 51.981 56.442 1.344 3.871 -1.821 –
Bossini et al. 2019 51.982 56.444 – – – –
Soubiran et al. 2018 51.982 56.444 – – – -21.88
Cantat-Gaudin et al. 2018 51.982 56.444 1.346 3.864 -1.814 –
Loktin & Popova 2017 51.96 56.4 – 2.7 -3.006 –
Kharchenko et al. 2016 52.001 56.463 – – – –
Dias et al. 2014 51.958 56.4 – 2.29 -1.8 –
Kharchenko et al. 2013 52.012 56.465 – 2.45 -1.82 –
Gozha et al. 2012 51.959 56.4 – – – –
Kharchenko et al. 2012 52.012 56.465 – 2.45 -1.82 –
Piskunov et al. 2008 52.005 56.453 – – – –
van den Bergh 2006 52.015 56.458 – – – –
Kharchenko et al. 2005 52.02 56.45 – -0.77 -2.01 –
Kharchenko et al. 2003 51.99 56.44 – -0.94 -2.56 –
Chen et al. 2003 52.031 56.456 – – – –
Dias et al. 2002 51.958 56.4 – 2.29 -1.8 –

💡 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 0.66 1.72 – 365 -0.043 – – –
Wei et al. 2025 0.79 1.36 – 186 0.250 663 0.23 –
Almeida et al. 2025 0.70 1.84 – 196 – 683 – –
Alfonso et al. 2024 0.75 1.34 – 214 0.147 – – –
Zhang et al. 2024 – – – – -0.148* – – –
Hunt & Reffert 2024 – – – – – 957* – –
Cavallo et al. 2024 0.77 1.84 – 178 0.310 – – –
Hunt & Reffert 2023 0.68 1.84 1.34 143 – – – –
Almeida et al. 2023 0.70 1.91 – 118 0.041 497* 0.58 –
Just et al. 2023 – – – 944 – 25 – –
He et al. 2022 – 2.15 – 45 – – – –
Tarricq et al. 2022 0.74 – – 209 – – – –
Jaehnig et al. 2021 0.73* – – – – – – –
Rain et al. 2021 0.73 1.55 – 251 – – – 0
Dias et al. 2021 0.70 1.84 – 196 0.147 – – –
Cantat-Gaudin et al. 2020 0.75 1.34 – 204 – – – –
Cantat-Gaudin & Anders 2020 0.73 – – – – – – –
Liu & Pang 2019 – – – 47 0.500 – – –
Bossini et al. 2019 0.81 1.11 – 382 0.460 – – –
Soubiran et al. 2018 0.73 – – – – – – –
Cantat-Gaudin et al. 2018 0.73 – – – – – – –
Loktin & Popova 2017 0.76 1.93 – 9 – – – –
Kharchenko et al. 2016 0.63 0.93 – 944 – – – –
Kharchenko et al. 2013 0.63 0.93 – 944 0.460 – – –
Gozha et al. 2012 0.87 – – 251 0.460 3 – –
Kharchenko et al. 2012 0.63 0.93 – 944 0.460 – – –
Piskunov et al. 2008 0.45 1.80 – 257 – – – –
van den Bergh 2006 0.87 1.55 – 219 – – – –
Kharchenko et al. 2005 0.45 1.80 – 257 – – – –
Kharchenko et al. 2003 0.87 1.55 – – – – – –
Chen et al. 2003 0.87 1.55 – 250 0.460* – – –
Dias et al. 2002 0.87 1.55 – 251 0.460 – – –

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

Visualization
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King 6 UCC
King 6 HUNT23
King 6 CANTAT20
Galactocentric position diagram