King 7

(MWSC 321; FoF 366)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 775
Radius (P>50% members) 3.2 [arcmin]
  • CN 1.0 Very 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 7 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Relatively close High extinction Massive Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for King 7 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 59.788 51.785 0.304 1.125 -1.189 -9.83
Almeida et al. 2025 59.775 51.784 – – – –
Zhang et al. 2024 59.786 51.787 – – – –
Hunt & Reffert 2024 59.786 51.787 0.301 1.129 -1.187 13.963
Cavallo et al. 2024 59.783 51.783 0.3 – – –
Hunt & Reffert 2023 59.786 51.787 0.301 1.129 -1.187 13.963
Just et al. 2023 59.767 51.781 – – – –
Jaehnig et al. 2021 59.783 51.789 0.319 1.156 -1.193 –
Rain et al. 2021 59.783 51.785 0.286 1.121 -1.196 –
Dias et al. 2021 59.775 51.784 0.277 1.136 -1.193 -9.469
Cantat-Gaudin et al. 2020 59.783 51.785 0.286 1.121 -1.196 –
Donor et al. 2020 59.778 51.782 – 0.97 -1.35 -9.7
Cantat-Gaudin & Anders 2020 59.783 51.785 0.286 1.121 -1.196 –
Liu & Pang 2019 59.792 51.779 0.297 1.058 -1.211 –
Soubiran et al. 2018 59.783 51.785 – – – -9.57
Cantat-Gaudin et al. 2018 59.783 51.785 0.286 1.121 -1.196 –
Loktin & Popova 2017 59.775 51.782 – -1.688 1.318 –
Kharchenko et al. 2016 59.767 51.781 – – – –
Dias et al. 2014 59.75 51.8 – 0.83 -1.36 –
Kharchenko et al. 2013 59.778 51.782 – -2.56 1.26 –
Gozha et al. 2012 59.75 51.8 – – – –
Kharchenko et al. 2012 59.778 51.782 – -2.33 1.38 –
van den Bergh 2006 59.75 51.8 – – – –
Dias et al. 2002 59.75 51.8 – 0.83 -1.36 –

💡 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
Almeida et al. 2025 2.59 3.55 – 324 – 2898 – –
Zhang et al. 2024 – – – – -0.106* – – –
Hunt & Reffert 2024 – – – – – 7497* – –
Cavallo et al. 2024 3.33 4.25 – 166 0.160 – – –
Hunt & Reffert 2023 2.90 4.18 2.62 191 – – – –
Just et al. 2023 – – – 708 – 2128 – –
Jaehnig et al. 2021 3.14* – – – – – – –
Rain et al. 2021 3.17 3.88 – 661 – – – 7
Dias et al. 2021 2.59 3.55 – 324 -0.039 – – –
Cantat-Gaudin et al. 2020 3.18 3.18 – 224 – – – –
Donor et al. 2020 – – – – -0.130 – – –
Cantat-Gaudin & Anders 2020 3.17 – – – – – – –
Liu & Pang 2019 – – – 1150 0.250 – – –
Soubiran et al. 2018 3.17 – – – – – – –
Cantat-Gaudin et al. 2018 3.17 – – – – – – –
Loktin & Popova 2017 1.70 3.39 – 427 – – – –
Kharchenko et al. 2016 2.63 3.87 – 708 – – – –
Kharchenko et al. 2013 2.63 3.87 – 708 – – – –
Gozha et al. 2012 2.20 – – 661 0.030 – – –
Kharchenko et al. 2012 2.63 3.87 – 716 – – – –
van den Bergh 2006 2.20 3.88 – 631 – – – –
Dias et al. 2002 2.20 3.88 – 661 -0.170 – – –

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

Visualization
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King 7 UCC
King 7 HUNT23
King 7 CANTAT20
Galactocentric position diagram