Czernik 21

(MWSC 543)

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0.92 UTI
1.0
CN
1.0
Cdens
0.62
CC3
1.0
Clit
1.0
Cdup
C3 classification AC
Number of members (P>50%) 571
Radius (P>50% members) 4.0 [arcmin]
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.62 Intermediate quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Czernik 21 is a very rich, very dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.
Distant Moderate extinction Massive Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Czernik 21 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 81.667 36.016 0.255 2.15 -0.913 43.587
Li et al. 2025 81.671 36.013 0.221 2.244 -0.907 –
Hu & Soubiran 2025 81.675 36.006 – – – –
Almeida et al. 2025 81.675 36.011 – – – –
Zhang et al. 2024 81.676 36.018 – – – –
Hunt & Reffert 2024 81.676 36.018 0.272 2.184 -0.891 41.628
Cavallo et al. 2024 81.675 36.006 0.265 – – –
Hunt & Reffert 2023 81.676 36.018 0.272 2.184 -0.891 41.628
Just et al. 2023 81.673 36.016 – – – –
Dias et al. 2021 81.675 36.011 0.225 2.291 -0.915 45.77
Cantat-Gaudin et al. 2020 81.671 36.013 0.221 2.244 -0.907 –
SΓ‘nchez et al. 2020 81.671 36.014 – 2.449 -0.915 –
Donor et al. 2020 81.683 36.015 – 2.38 -1.04 45.0
Cantat-Gaudin & Anders 2020 81.671 36.013 0.221 2.244 -0.907 –
Soubiran et al. 2018 81.671 36.013 – – – 45.52
Cantat-Gaudin et al. 2018 81.671 36.013 0.221 2.244 -0.907 –
Loktin & Popova 2017 81.675 36.015 – 0.591 -1.279 –
Kharchenko et al. 2016 81.673 36.016 – – – –
Dias et al. 2014 81.671 36.014 – -2.56 -4.73 –
Kharchenko et al. 2013 81.682 36.015 – 1.41 -3.82 –
Kharchenko et al. 2012 81.682 36.015 – 1.41 -3.82 –
Glushkova et al. 2010 81.671 36.014 – – – –
Dias et al. 2002 81.671 36.014 – -2.56 -4.73 –

πŸ’‘ 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 3.38 2.98 – 2364 -0.306 – – –
Hu & Soubiran 2025 – – – – -0.300* – – –
Almeida et al. 2025 4.27 2.87 – 1416 – 2311 – –
Zhang et al. 2024 – – – – -0.323* – – –
Hunt & Reffert 2024 – – – – – 2424* – –
Cavallo et al. 2024 3.85 2.58 – 1549 0.020 – – –
Hunt & Reffert 2023 3.24 2.76 2.31 1047 – – – –
Just et al. 2023 – – – 2239 – 4634 – –
Dias et al. 2021 4.27 2.87 – 1416 -0.239 – – –
Cantat-Gaudin et al. 2020 4.04 2.05 – 2570 – – – –
Donor et al. 2020 – – – – -0.320 – – –
Cantat-Gaudin & Anders 2020 4.00 – – – – – – –
Soubiran et al. 2018 4.00 – – – – – – –
Cantat-Gaudin et al. 2018 4.00 – – – – – – –
Loktin & Popova 2017 4.13 2.35 – 741 – – – –
Kharchenko et al. 2016 4.30 2.63 – 2239 – – – –
Kharchenko et al. 2013 4.30 2.63 – 2239 – – – –
Kharchenko et al. 2012 4.30 2.63 – 2239 – – – –
Glushkova et al. 2010 2.30 2.23 – 3548 – – – –
Dias et al. 2002 2.30 2.23 – 3548 – – – –

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

Visualization
ℹ️
Czernik 21 UCC
Czernik 21 HUNT23
Czernik 21 CANTAT20
Galactocentric position diagram