Czernik 18

(MWSC 381; OCL 426)

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0.87 UTI
0.66
CN
1.0
Cdens
0.75
CC3
0.97
Clit
1.0
Cdup
Nm (P>50%) 81
Core radius and density 1.1 [pc], 7.4 [pc-2]
C3 classification AB
  • CN 0.66 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.97 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Czernik 18 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, below 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.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.97 (50th percentile), true positive (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.97 (50th percentile), true positive (human-assigned).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.3016, e_all=0.4252.

Data
πŸ” Search references for Czernik 18 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 66.963 30.93 0.748 1.722 -3.079 -13.183
Otto et al. 2026 66.956 30.934 – 1.83 -2.99 -15.5
Zhang et al. 2024 66.956 30.934 – – – –
Hunt & Reffert 2024 66.956 30.934 0.75 1.706 -3.072 -9.617
Cavallo et al. 2024 66.96 30.918 0.753 – – –
Hunt & Reffert 2023 66.956 30.934 0.75 1.706 -3.072 -9.617
Just et al. 2023 66.948 30.945 – – – –
Tarricq et al. 2022 66.963 30.947 0.739 1.705 -3.076 –
Jadhav & Subramaniam 2021 66.963 30.936 – – – –
Netopil et al. 2022 66.962 30.936 – – – -14.9
Spina et al. 2021 66.963 30.938 0.734 1.843 -2.977 –
Cantat-Gaudin et al. 2020 66.963 30.936 0.738 1.826 -2.994 –
SΓ‘nchez et al. 2020 67.0 30.933 – 2.006 -2.813 –
Donor et al. 2020 66.957 30.945 – 2.2 -2.89 -15.3
Zhong et al. 2020 66.963 30.936 – 1.826 -2.994 -10.23
Cantat-Gaudin & Anders 2020 66.963 30.936 0.738 1.826 -2.994 –
Bica et al. 2019 66.959 30.937 – – – –
Cantat-Gaudin et al. 2018 66.963 30.936 0.738 1.826 -2.994 –
Dias et al. 2018 – – – 0.57 -4.17 –
Dib et al. 2018 66.957 30.945 – – – –
Loktin & Popova 2017 66.96 30.945 – -3.618 -6.296 –
Sampedro et al. 2017 67.0 30.933 – 0.38 -2.72 –
Joshi et al. 2016 66.957 30.945 – – – –
Kharchenko et al. 2016 66.948 30.945 – – – –
Dias et al. 2014 67.0 30.933 – 0.1 -3.72 –
Kharchenko et al. 2013 66.957 30.945 – -2.65 -6.15 –
Kharchenko et al. 2012 66.957 30.945 – -2.65 -6.15 –
Bukowiecki et al. 2011 66.954 30.946 – – – –
Dias et al. 2002 67.0 30.933 – 0.1 -3.72 –
Lynga 1987 67.0 30.943 – – – –

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] Bfrac BSS
UCC 99999– 1.27 1.74 2.01 479 -0.070 230 – 0
Otto et al. 2026 – – – 525 -0.040(15) – – –
Zhang et al. 2024 – – – – -0.330(1) – – –
Hunt & Reffert 2024 1.27 1.74 2.01 247 – 326(1) – –
Cavallo et al. 2024 1.38 2.04 – 389 0.050 – – –
Hunt & Reffert 2023 1.27 1.74 2.01 247 – – – –
Just et al. 2023 – – – 479 – 54 – –
Spina et al. 2022 – – – – -0.070 – – –
Tarricq et al. 2022 1.27 – – 525 – – – –
Jadhav & Subramaniam 2021 1.32 1.34 – 525 – 256 – 0(1)
Netopil et al. 2022 1.33(1) – – 525 -0.070(1) – – –
Spina et al. 2021 1.37 – – 525 – – – –
Cantat-Gaudin et al. 2020 1.32 1.34 – 525 – – – –
Kounkel et al. 2020 1.26 1.36 – 324 – – – –
Donor et al. 2020 – – – – -0.070 – – –
Zhong et al. 2020 1.30(1) 1.89 – 8680 -0.059 – – –
Cantat-Gaudin & Anders 2020 1.30 – – – – – – –
Cantat-Gaudin et al. 2018 1.30 – – – – – – –
Dib et al. 2018 1.26 – – 479 – – – –
Loktin & Popova 2017 1.56 1.68 – 479 – – – –
Joshi et al. 2016 1.26 1.89 – 479 – – – –
Kharchenko et al. 2016 1.26 1.89 – 479 – – – –
Kharchenko et al. 2013 1.26 1.89 – 479 – – – –
Bukowiecki et al. 2012 – – – – – 203 – –
Kharchenko et al. 2012 1.26 1.89 – 479 – – – –
Bukowiecki et al. 2011 1.05(1) 0.82 – 1000 – – – –
Dias et al. 2002 1.05 0.85 – 1000 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
ℹ️
Czernik 18 UCC
Czernik 18 HUNT23
Czernik 18 CANTAT20
Galactocentric position diagram