NGC 189

(Collinder 462; MWSC 62; OCL 301; FoF 2127)

0.91 UTI

0.78

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 167

Stellar density (N₅₀/rad) 15.8 [N/pc²]

C3 classification AB

C_N 0.78 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 189 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

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

Richer et al. (2021)
The expected number of WDs is 18.0, 0 WD candidates found, and 0 WD candidates found in the wide search.

Data

🔍 Search references for NGC 189 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–	9.883	61.096	0.769	0.335	-3.355	-31.393
Li et al.	2025	9.885	61.09	0.772	0.338	-3.306	–
Hu & Soubiran	2025	9.845	61.1	–	–	–	–
Almeida et al.	2025	9.889	61.097	–	–	–	–
Hunt & Reffert	2024	9.895	61.088	0.774	0.33	-3.359	-29.552
Cavallo et al.	2024	9.845	61.1	0.772	–	–	–
Hunt & Reffert	2023	9.895	61.088	0.774	0.33	-3.359	-29.552
Almeida et al.	2023	9.881	61.093	–	–	–	–
Just et al.	2023	9.861	61.112	–	–	–	–
Tarricq et al.	2022	9.873	61.087	0.773	0.315	-3.356	–
Jadhav & Subramaniam	2021	9.885	61.09	–	–	–	–
Richer et al.	2021	9.872	61.097	0.772	0.357	-3.265	–
Dias et al.	2021	9.889	61.097	0.779	0.336	-3.315	-29.391
Cantat-Gaudin et al.	2020	9.885	61.09	0.772	0.338	-3.306	–
Cantat-Gaudin & Anders	2020	9.885	61.09	0.772	0.338	-3.306	–
Liu & Pang	2019	9.947	61.101	0.768	0.323	-3.307	–
Soubiran et al.	2018	9.885	61.09	–	–	–	-28.71
Bica et al.	2019	9.876	61.098	–	–	–	–
Cantat-Gaudin et al.	2018	9.885	61.09	0.772	0.338	-3.306	–
Loktin & Popova	2017	9.9	61.095	–	-2.761	-2.398	–
Kharchenko et al.	2016	9.861	61.112	–	–	–	–
Dias et al.	2014	9.896	61.095	–	-0.36	-3.02	–
Kharchenko et al.	2013	9.87	61.115	–	-0.31	-2.71	–
Kharchenko et al.	2012	9.87	61.115	–	-0.31	-2.71	–
Bukowiecki et al.	2011	9.871	61.105	–	–	–	–
van den Bergh	2006	9.9	61.067	–	–	–	–
Dias et al.	2002	9.896	61.095	–	-0.36	-3.02	–
Lynga	1987	9.921	61.069	–	–	–	–
Sulentic et al.	1973	9.687	61.054	–	–	–	–

💡 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–	1.23	1.77	1.43	486	0.084	236	0.61	0
Li et al.	2025	0.94	1.56	–	1200	-0.342	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.040⁽⁵⁾	–	–	–
Almeida et al.	2025	1.25	1.87	–	486	–	210	–	–
Hunt & Reffert	2024	–	–	–	–	–	590⁽¹⁾	–	–
Cavallo et al.	2024	1.22	1.58	–	631	0.560	–	–	–
Hunt & Reffert	2023	1.24	1.78	1.43	313	–	–	–	–
Almeida et al.	2023	1.21	1.83	–	640	0.048	281⁽¹⁾	0.61	–
Just et al.	2023	–	–	–	512	–	16	–	–
Tarricq et al.	2022	1.20	–	–	417	–	–	–	–
Jadhav & Subramaniam	2021	1.23	1.54	–	398	–	261	–	0⁽¹⁾
Richer et al.	2021	–	1.76	–	398	–	–	–	–
Dias et al.	2021	1.25	1.87	–	486	0.119	–	–	–
Cantat-Gaudin et al.	2020	1.23	1.54	–	398	–	–	–	–
Kounkel et al.	2020	1.18	2.00	–	550	–	–	–	–
Cantat-Gaudin & Anders	2020	1.25	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	562	0.250	–	–	–
Soubiran et al.	2018	1.25	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.25	–	–	–	–	–	–	–
Loktin & Popova	2017	1.09	1.02	–	380	–	–	–	–
Kharchenko et al.	2016	1.30	2.21	–	512	–	–	–	–
Kharchenko et al.	2013	1.30	2.21	–	512	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	150	–	–
Kharchenko et al.	2012	1.30	2.21	–	512	–	–	–	–
Bukowiecki et al.	2011	0.87⁽¹⁾	2.24	–	9	–	–	–	–
van den Bergh	2006	0.75	1.32	–	10	–	–	–	–
Dias et al.	2002	0.75	1.32	–	10	–	–	–	–
Lynga	1987	1.08	1.70	–	20	–	–	–	–

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

Visualization

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