Melotte 184

(Collinder 356; NGC 6494; MWSC 2757; M 23; OCL 30; ESO 589 22; FoF 2336)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 822

Stellar density (N₅₀/rad) 65.8 [N/pc²]

C3 classification AA

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very 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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Melotte 184 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, 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.

Close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 184 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–	269.24	-18.99	1.366	0.31	-1.831	-9.238
Nizovkina et al.	2025	269.232	-18.999	–	–	–	–
Li et al.	2025	269.237	-18.987	1.354	0.284	-1.809	–
Wei et al.	2025	269.23	-18.988	1.366	0.311	-1.837	–
Almeida et al.	2025	269.241	-18.969	–	–	–	–
Alfonso et al.	2024	269.23	-18.987	1.329	0.308	-1.843	–
Hunt & Reffert	2024	269.232	-18.999	1.368	0.314	-1.824	-10.867
Cavallo et al.	2024	269.246	-18.96	1.367	–	–	–
Hunt & Reffert	2023	269.232	-18.999	1.368	0.314	-1.824	-10.867
Cordoni et al.	2023	269.241	-18.969	1.359	0.284	-1.798	–
Just et al.	2023	269.219	-19.001	–	–	–	–
He et al.	2022	269.233	-18.976	1.369	0.305	-1.844	–
Tarricq et al.	2022	269.256	-19.027	1.367	0.299	-1.837	–
Jaehnig et al.	2021	269.244	-18.996	1.387	0.281	-1.803	–
Rain et al.	2021	269.237	-18.987	1.354	0.284	-1.809	–
Dias et al.	2021	269.241	-18.969	1.359	0.284	-1.798	-7.639
Cantat-Gaudin et al.	2020	269.237	-18.987	1.354	0.284	-1.809	–
Cantat-Gaudin & Anders	2020	269.237	-18.987	1.354	0.284	-1.809	–
Liu & Pang	2019	269.245	-18.962	1.367	0.293	-1.786	–
Bossini et al.	2019	269.237	-18.987	–	–	–	–
Soubiran et al.	2018	269.237	-18.987	–	–	–	-8.37
Bica et al.	2019	269.24	-18.998	–	–	–	–
Cantat-Gaudin et al.	2018	269.237	-18.987	1.354	0.284	-1.809	–
Loktin & Popova	2017	269.265	-18.986	–	0.72	-0.94	-8.6
Kharchenko et al.	2016	269.219	-19.001	–	–	–	–
Dias et al.	2014	269.267	-18.985	–	0.72	-0.94	–
Kharchenko et al.	2013	269.227	-19.0	–	1.93	-1.4	-8.6
Gozha et al.	2012	269.267	-18.985	–	–	–	–
Piskunov et al.	2008	269.254	-18.994	–	–	–	–
Kharchenko et al.	2007	269.26	-18.99	–	0.58	–	–
Piskunov et al.	2007	269.254	-18.994	–	–	–	–
van den Bergh	2006	269.25	-18.983	–	–	–	–
Kharchenko et al.	2005	269.26	-18.99	–	0.65	-1.14	–
Kharchenko et al.	2003	269.25	-19.02	–	0.81	-1.18	–
Chen et al.	2003	269.239	-18.968	–	-1.3	-0.67	-8.6
Dias et al.	2002	269.267	-18.985	–	0.72	-0.94	-8.18

💡 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–	0.685	1.12	0.93	331	0.090	1996	0.505	0.0
Nizovkina et al.	2025	0.58⁽⁴⁾	1.31⁽⁴⁾	–	346⁽⁴⁾	-0.257⁽⁴⁾	–	–	–
Li et al.	2025	0.72	1.07	–	464	0.154	–	–	–
Wei et al.	2025	1.24	1.41	–	363	0.250	2760	0.62	–
Almeida et al.	2025	0.69	1.28	–	331	–	1875	–	–
Alfonso et al.	2024	0.74	0.91	–	502	0.096	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	4068⁽¹⁾	–	–
Cavallo et al.	2024	0.68	1.63	–	257	-0.230	–	–	–
Hunt & Reffert	2023	0.69	1.13	0.93	226	–	–	–	–
Cordoni et al.	2023	0.69	1.28	–	331	0.095	2118	0.39	0.00
Just et al.	2023	–	–	–	327	–	3013	–	–
He et al.	2022	–	1.45	–	282	–	–	–	–
Tarricq et al.	2022	0.73	–	–	407	–	–	–	–
Jaehnig et al.	2021	0.72⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	0.72	0.84	–	479	–	–	–	0
Dias et al.	2021	0.69	1.28	–	331	0.095	–	–	–
Cantat-Gaudin et al.	2020	0.74	0.91	–	380	–	–	–	–
Cantat-Gaudin & Anders	2020	0.72	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	282	0.250	–	–	–
Bossini et al.	2019	0.66	0.85	–	479	-0.040	–	–	–
Soubiran et al.	2018	0.72	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.72	–	–	–	–	–	–	–
Loktin & Popova	2017	0.63	1.10	–	300	–	–	–	–
Kharchenko et al.	2016	0.65	1.35	–	327	–	–	–	–
Kharchenko et al.	2013	0.65	1.35	–	327	0.090	–	–	–
Gozha et al.	2012	0.63	–	–	300	0.040	562	–	–
Piskunov et al.	2008	0.63	1.12	–	331	–	1698⁽¹⁾	–	–
Piskunov et al.	2007	0.63	1.12	–	331	–	589	–	–
van den Bergh	2006	0.63	1.12	–	302	–	–	–	–
Kharchenko et al.	2005	0.63	1.12	–	331	–	–	–	–
Kharchenko et al.	2003	0.63	1.08	–	–	–	–	–	–
Chen et al.	2003	0.63	1.10	–	290	0.090⁽¹⁾	–	–	–
Dias et al.	2002	0.63	1.10	–	300	0.040	–	–	–

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

Visualization

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