King 2

(MWSC 79; OCL 311)

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0.93 UTI
0.89
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 476
Radius (P>50% members) 2.1 [arcmin]
  • CN 0.89 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 2 is a rich, very dense object of high C3 quality. Its parallax locates it at a large* distance, below the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, old 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.

(*): The parallax distance estimate (~7.40 kpc) differs significantly from the median photometric distance (~5.50 kpc).

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

Very distant Low extinction Massive Near-solar metallicity Old Contains BSS

Cavallo et al. (2024)
Silver sample.

Data
🔍 Search references for King 2 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 – 12.739 58.192 0.135 -1.399 -0.869 -137.646
Li et al. 2025 12.741 58.188 0.166 -1.358 -0.824 –
Hunt & Reffert 2024 12.739 58.187 0.162 -1.419 -0.844 -101.762
Cavallo et al. 2024 12.743 58.192 0.154 – – –
Hunt & Reffert 2023 12.739 58.187 0.162 -1.419 -0.844 -101.762
Just et al. 2023 12.722 58.198 – – – –
Jaehnig et al. 2021 12.736 58.194 0.156 -1.381 -0.816 –
Rain et al. 2021 12.741 58.188 0.166 -1.358 -0.824 –
Cantat-Gaudin et al. 2020 12.741 58.188 0.166 -1.358 -0.824 –
Donor et al. 2020 12.732 58.201 – -1.49 -0.92 -135.5
Cantat-Gaudin & Anders 2020 12.741 58.188 0.166 -1.358 -0.824 –
Bica et al. 2019 12.723 58.202 – – – –
Cantat-Gaudin et al. 2018 12.741 58.188 0.166 -1.358 -0.824 –
Loktin & Popova 2017 12.75 58.201 – -0.223 -1.271 -144.2
Kharchenko et al. 2016 12.722 58.198 – – – –
Dias et al. 2014 12.75 58.183 – -2.0 -2.6 –
Kharchenko et al. 2013 12.732 58.201 – -1.71 -0.08 -144.2
Gozha et al. 2012 12.75 58.184 – – – –
Kharchenko et al. 2012 12.732 58.201 – -1.71 -0.08 -144.25
van den Bergh 2006 12.75 58.183 – – – –
Dias et al. 2002 12.75 58.183 – -2.0 -2.6 -144.25

💡 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 5.15 1.69 – 1366 -0.360 – – –
Hunt & Reffert 2024 – – – – – 1949* – –
Cavallo et al. 2024 4.09 1.13 – 2291 -0.290 – – –
Hunt & Reffert 2023 5.07 1.22 2.16 1096 – – – –
Just et al. 2023 – – – 4677 – 305 – –
Jaehnig et al. 2021 6.35* – – – – – – –
Rain et al. 2021 5.14 0.96 – 6026 – – – 26
Cantat-Gaudin et al. 2020 6.76 0.97 – 4074 – – – –
Donor et al. 2020 – – – – -0.360 – – –
Cantat-Gaudin & Anders 2020 5.14 – – – – – – –
Cantat-Gaudin et al. 2018 5.14 – – – – – – –
Loktin & Popova 2017 1.78 1.70 – 2818 – – – –
Kharchenko et al. 2016 5.50 0.93 – 4677 – – – –
Kharchenko et al. 2013 5.50 0.93 – 4677 -0.420 – – –
Gozha et al. 2012 5.75 – – 6026 -0.420 – – –
Kharchenko et al. 2012 5.50 0.93 – 4677 -0.420 – – –
van den Bergh 2006 5.75 0.96 – 6026 – – – –
Dias et al. 2002 5.75 0.96 – 6026 -0.420 – – –

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

Visualization
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King 2 UCC
King 2 HUNT23
King 2 CANTAT20
Galactocentric position diagram