Melotte 232

(Collinder 424; NGC 6940; MWSC 3370; OCL 141; FoF 2054)

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) 808

Stellar density (N₅₀/rad) 45.1 [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

ℹ️

Melotte 232 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Close Low extinction Massive Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 232 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	308.639	28.284	0.956	-1.952	-9.431	8.069
Li et al.	2025	308.626	28.278	0.947	-1.954	-9.413	–
Hu & Soubiran	2025	308.633	28.292	–	–	–	–
Wei et al.	2025	308.634	28.28	0.961	-1.939	-9.43	–
Almeida et al.	2025	308.615	28.273	–	–	–	–
Hunt & Reffert	2024	308.591	28.258	0.958	-1.954	-9.437	8.023
Cavallo et al.	2024	308.633	28.292	0.959	–	–	–
Hunt & Reffert	2023	308.591	28.258	0.958	-1.954	-9.437	8.023
Almeida et al.	2023	308.557	28.304	–	–	–	–
Cordoni et al.	2023	308.615	28.273	0.95	-1.958	-9.411	–
Just et al.	2023	308.604	28.277	–	–	–	–
He et al.	2022	308.628	28.294	0.958	-1.949	-9.437	–
Tarricq et al.	2022	308.626	28.249	0.959	-1.941	-9.43	–
Jaehnig et al.	2021	308.619	28.269	0.977	-1.977	-9.415	–
Rain et al.	2021	308.626	28.278	0.947	-1.954	-9.413	–
Dias et al.	2021	308.615	28.273	0.95	-1.958	-9.411	8.047
Cantat-Gaudin et al.	2020	308.626	28.278	0.947	-1.954	-9.413	–
Cantat-Gaudin & Anders	2020	308.626	28.278	0.947	-1.954	-9.413	–
Liu & Pang	2019	308.632	28.299	0.951	-1.971	-9.398	–
Bossini et al.	2019	308.626	28.278	–	–	–	–
Soubiran et al.	2018	308.626	28.278	–	–	–	8.1
Bica et al.	2019	308.612	28.317	–	–	–	–
Cantat-Gaudin et al.	2018	308.626	28.278	0.947	-1.954	-9.413	–
Loktin & Popova	2017	308.61	28.283	–	-0.935	-1.834	4.7
Kharchenko et al.	2016	308.604	28.277	–	–	–	–
Dias et al.	2014	308.608	28.283	–	-3.4	-4.47	–
Kharchenko et al.	2013	308.61	28.28	–	-1.6	-8.69	4.7
Gozha et al.	2012	308.608	28.283	–	–	–	–
Piskunov et al.	2008	308.604	28.273	–	–	–	–
Kharchenko et al.	2007	308.61	28.28	–	0.5	–	4.66
Piskunov et al.	2007	308.604	28.273	–	–	–	–
van den Bergh	2006	308.6	28.283	–	–	–	–
Kharchenko et al.	2005	308.61	28.28	–	-1.5	-8.93	4.42
Kharchenko et al.	2003	308.62	28.28	–	-1.74	-9.11	–
Chen et al.	2003	308.656	28.302	–	-2.23	-9.7	7.7
Dias et al.	2002	308.608	28.283	–	-3.4	-4.47	7.89

💡 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–	0.99	0.65	0.67	912	0.010	1293	0.43	0.01
Li et al.	2025	0.97	0.58	–	1209	-0.050	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.120⁽⁵⁾	–	–	–
Wei et al.	2025	0.98	0.30	–	912	0.500	1356	0.32	–
Almeida et al.	2025	0.99	0.69	–	1175	–	1293	–	–
Hunt & Reffert	2024	–	–	–	–	–	2132⁽¹⁾	–	–
Cavallo et al.	2024	1.06	0.78	–	851	0.170	–	–	–
Hunt & Reffert	2023	0.99	0.45	0.67	769	–	–	–	–
Almeida et al.	2023	1.00	0.71	–	1052	0.008	1393⁽¹⁾	0.49	–
Cordoni et al.	2023	0.99	0.69	–	1175	-0.032	1310	0.43	0.01
Just et al.	2023	–	–	–	955	–	149	–	–
He et al.	2022	–	0.80	–	891	–	–	–	–
Tarricq et al.	2022	1.07	–	–	1380	–	–	–	–
Jaehnig et al.	2021	1.03⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.02	0.65	–	708	–	–	–	2
Dias et al.	2021	0.99	0.69	–	1175	-0.032	–	–	–
Cantat-Gaudin et al.	2020	1.10	0.41	–	1349	–	–	–	–
Cantat-Gaudin & Anders	2020	1.02	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1950	-0.500	–	–	–
Bossini et al.	2019	1.03	0.46	–	1023	0.150	–	–	–
Soubiran et al.	2018	1.02	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.02	–	–	–	–	–	–	–
Loktin & Popova	2017	0.84	0.64	–	757	–	–	–	–
Kharchenko et al.	2016	0.84	0.65	–	955	–	–	–	–
Kharchenko et al.	2013	0.84	0.65	–	955	0.013	–	–	–
Gozha et al.	2012	0.77	–	–	721	0.010	363	–	–
Piskunov et al.	2008	0.77	0.65	–	871	–	589⁽¹⁾	–	–
Piskunov et al.	2007	0.77	0.65	–	871	–	185	–	–
van den Bergh	2006	0.77	0.65	–	724	–	–	–	–
Kharchenko et al.	2005	0.77	0.65	–	871	–	–	–	–
Kharchenko et al.	2003	0.77	0.65	–	–	–	–	–	–
Chen et al.	2003	0.77	0.66	–	720	0.010⁽¹⁾	–	–	–
Dias et al.	2002	0.77	0.66	–	721	0.013	–	–	–

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

Visualization

ℹ️

1 2 3