King 8

(MWSC 675; OCL 448)

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0.91 UTI
0.8
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 240
Radius (P>50% members) 1.6 [arcmin]
  • CN 0.8 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
ℹī¸
King 8 is a rich, very dense object of high C3 quality. Its parallax locates it at a large distance, above 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 contains blue stragglers according to at least one source.

Very distant Moderate extinction Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for King 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 – 87.324 33.633 0.172 0.472 -1.706 -1.832
Li et al. 2025 87.324 33.633 0.131 0.52 -1.743 –
Hu & Soubiran 2025 87.321 33.629 – – – –
Almeida et al. 2025 87.327 33.633 – – – –
Hunt & Reffert 2024 87.327 33.635 0.177 0.458 -1.704 1.595
Cavallo et al. 2024 87.321 33.629 0.174 – – –
Hunt & Reffert 2023 87.327 33.635 0.177 0.458 -1.704 1.595
Just et al. 2023 87.318 33.631 – – – –
Jaehnig et al. 2021 87.325 33.633 0.143 0.48 -1.747 –
Rain et al. 2021 87.324 33.633 0.131 0.52 -1.743 –
Dias et al. 2021 87.327 33.633 0.129 0.53 -1.754 –
Cantat-Gaudin et al. 2020 87.324 33.633 0.131 0.52 -1.743 –
Donor et al. 2020 87.327 33.63 – 0.89 -1.47 -0.9
Cantat-Gaudin & Anders 2020 87.324 33.633 0.131 0.52 -1.743 –
Soubiran et al. 2018 87.324 33.633 – – – 22.8
Bica et al. 2019 87.321 33.636 – – – –
Cantat-Gaudin et al. 2018 87.324 33.633 0.131 0.52 -1.743 –
Loktin & Popova 2017 87.33 33.634 – 0.538 -1.423 -1.0
Kharchenko et al. 2016 87.318 33.631 – – – –
Dias et al. 2014 87.35 33.633 – 2.58 -4.04 –
Kharchenko et al. 2013 87.327 33.63 – 0.78 -3.99 -1.0
Gozha et al. 2012 87.35 33.633 – – – –
Kharchenko et al. 2012 87.327 33.63 – 0.78 -3.99 -1.0
Glushkova et al. 2010 87.329 33.627 – – – –
Kharchenko et al. 2007 87.34 33.63 – 0.03 – –
van den Bergh 2006 87.35 33.633 – – – –
Chen et al. 2003 87.348 33.638 – – – –
Dias et al. 2002 87.35 33.633 – 2.58 -4.04 -1.0

💡 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 4.58 2.05 – 925 -0.151 – – –
Hu & Soubiran 2025 – – – – -0.300* – – –
Almeida et al. 2025 3.94 1.90 – 822 – 868 – –
Hunt & Reffert 2024 – – – – – 1770* – –
Cavallo et al. 2024 3.73 1.77 – 1072 0.110 – – –
Hunt & Reffert 2023 5.21 2.10 2.08 502 – – – –
Just et al. 2023 – – – 1012 – 813 – –
Jaehnig et al. 2021 6.80* – – – – – – –
Rain et al. 2021 6.24 1.80 – 407 – – – 3
Dias et al. 2021 3.94 1.90 – 822 0.074 – – –
Cantat-Gaudin et al. 2020 5.52 1.38 – 832 – – – –
Donor et al. 2020 – – – – -0.160 – – –
Cantat-Gaudin & Anders 2020 6.24 – – – – – – –
Soubiran et al. 2018 6.24 – – – – – – –
Cantat-Gaudin et al. 2018 6.24 – – – – – – –
Loktin & Popova 2017 6.80 1.75 – 401 – – – –
Kharchenko et al. 2016 4.50 1.96 – 1012 – – – –
Kharchenko et al. 2013 4.50 1.96 – 1012 -0.460 – – –
Gozha et al. 2012 6.40 – – 415 -0.460 – – –
Kharchenko et al. 2012 4.50 1.96 – 1012 -0.460 – – –
Glushkova et al. 2010 3.10 1.36 – 1122 – – – –
van den Bergh 2006 6.40 1.80 – 417 – – – –
Chen et al. 2003 6.40 1.80 – 410 -0.460* – – –
Dias et al. 2002 6.40 1.80 – 415 -0.460 – – –

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

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