Czernik 9

(MWSC 212)

0.80 UTI

0.75

C_N

1.0

C_dens

0.75

C_C3

0.74

C_lit

1.0

C_dup

N_m (P>50%) 112

Core radius and density 1.2 [pc], 7.9 [pc^-2]

C3 classification AB

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.74 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Czernik 9 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is moderately studied in the literature.

Relatively close High extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.262, e_all=0.2454.

Data

🔍 Search references for Czernik 9 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	99999–	38.394	59.884	0.316	-0.953	0.246	-47.413
Otto et al.	2026	38.394	59.882	–	-0.91	0.27	-47.3
Almeida et al.	2025	38.398	59.882	–	–	–	–
Hunt & Reffert	2024	38.394	59.882	0.317	-0.935	0.23	-53.212
Cavallo et al.	2024	38.394	59.89	0.318	–	–	–
Hunt & Reffert	2023	38.394	59.882	0.317	-0.935	0.23	-53.212
Almeida et al.	2023	38.399	59.877	–	–	–	–
Just et al.	2023	38.373	59.872	–	–	–	–
Dias et al.	2021	38.398	59.882	0.303	-0.919	0.256	-46.83
Cantat-Gaudin et al.	2020	38.393	59.883	0.3	-0.912	0.272	–
Cantat-Gaudin & Anders	2020	38.393	59.883	0.3	-0.912	0.272	–
Soubiran et al.	2018	38.393	59.883	–	–	–	-46.74
Cantat-Gaudin et al.	2018	38.393	59.883	0.3	-0.912	0.272	–
Dias et al.	2018	–	–	–	-0.71	-0.24	–
Dib et al.	2018	38.385	59.875	–	–	–	–
Loktin & Popova	2017	38.385	59.887	–	-1.62	-2.696	–
Sampedro et al.	2017	38.383	59.887	–	-0.58	-0.78	–
Kharchenko et al.	2016	38.373	59.872	–	–	–	–
Dias et al.	2014	38.383	59.887	–	-1.4	0.28	–
Kharchenko et al.	2013	38.385	59.875	–	-2.62	-3.09	–
Kharchenko et al.	2012	38.385	59.875	–	-2.62	-3.09	–
Bukowiecki et al.	2011	38.383	59.885	–	–	–	–
Dias et al.	2002	38.383	59.887	–	-1.4	0.28	–
Lynga	1987	38.412	59.888	–	–	–	–

💡 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]	B_frac	BSS
UCC	99999–	2.56	3.295	1.72	427	-0.073	587	0.71	–
Otto et al.	2026	–	–	–	240	-0.070⁽¹⁵⁾	–	–	–
Almeida et al.	2025	2.56	3.20	–	395	–	587	–	–
Hunt & Reffert	2024	2.80	3.69	1.72	216	–	725⁽¹⁾	–	–
Cavallo et al.	2024	3.84	3.70	–	191	0.520	–	–	–
Hunt & Reffert	2023	2.80	3.69	1.72	216	–	–	–	–
Almeida et al.	2023	2.51	3.28	–	347	-0.146	489⁽¹⁾	0.71	–
Just et al.	2023	–	–	–	562	–	55	–	–
Dias et al.	2021	2.56	3.20	–	395	-0.076	–	–	–
Cantat-Gaudin et al.	2020	3.31	3.01	–	240	–	–	–	–
Kounkel et al.	2020	3.09	3.25	–	437	–	–	–	–
Cantat-Gaudin & Anders	2020	3.03	–	–	–	–	–	–	–
Soubiran et al.	2018	3.03	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.03	–	–	–	–	–	–	–
Dib et al.	2018	1.90	–	–	562	–	–	–	–
Loktin & Popova	2017	1.54	2.86	–	427	–	–	–	–
Kharchenko et al.	2016	1.90	3.31	–	562	–	–	–	–
Kharchenko et al.	2013	1.90	3.31	–	562	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	657	–	–
Kharchenko et al.	2012	1.90	3.31	–	562	–	–	–	–
Bukowiecki et al.	2011	2.13⁽¹⁾	2.93	–	447	–	–	–	–
Dias et al.	2002	1.66	3.31	–	631	–	–	–	–

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

Visualization

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