Melotte 43

(Collinder 87; NGC 2194; MWSC 803; OCL 485; FSR 0961; FoF 78)

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) 1299

Stellar density (N₅₀/rad) 60.2 [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 43 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a very 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.

Distant Moderate extinction Very massive Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 43 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–	93.434	12.809	0.282	0.493	-1.433	8.636
Li et al.	2025	93.44	12.813	0.263	0.535	-1.468	–
Hu & Soubiran	2025	93.438	12.811	–	–	–	–
Carrasco-Varela et al.	2025	93.654	12.78	–	–	–	–
Almeida et al.	2025	93.451	12.813	–	–	–	–
Zhang et al.	2024	93.43	12.81	–	–	–	–
Hunt & Reffert	2024	93.43	12.81	0.286	0.486	-1.431	8.627
Cavallo et al.	2024	93.438	12.811	0.284	–	–	–
Hunt & Reffert	2023	93.43	12.81	0.286	0.486	-1.431	8.627
Just et al.	2023	93.435	12.819	–	–	–	–
Jaehnig et al.	2021	93.437	12.808	0.295	0.519	-1.432	–
Rain et al.	2021	93.44	12.813	0.263	0.535	-1.468	–
Dias et al.	2021	93.451	12.813	0.265	0.524	-1.466	41.623
Cantat-Gaudin et al.	2020	93.44	12.813	0.263	0.535	-1.468	–
Cantat-Gaudin & Anders	2020	93.44	12.813	0.263	0.535	-1.468	–
Liu & Pang	2019	93.436	12.811	0.285	0.497	-1.417	–
Soubiran et al.	2018	93.44	12.813	–	–	–	30.19
Bica et al.	2019	93.432	12.815	–	–	–	–
Cantat-Gaudin et al.	2018	93.44	12.813	0.263	0.535	-1.468	–
Loktin & Popova	2017	93.435	12.808	–	2.1	-1.88	7.5
Kharchenko et al.	2016	93.435	12.819	–	–	–	–
Dias et al.	2014	93.438	12.807	–	2.1	-1.88	–
Kharchenko et al.	2013	93.442	12.818	–	0.28	-1.43	7.5
Gozha et al.	2012	93.438	12.807	–	–	–	–
van den Bergh	2006	93.427	12.802	–	–	–	–
Dias et al.	2002	93.438	12.807	–	2.1	-1.88	7.5

💡 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–	3.42	1.49	0.82	612	-0.080	5128	–	0.03
Li et al.	2025	3.15	1.54	–	594	-0.056	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.240⁽⁵⁾	–	–	–
Carrasco-Varela et al.	2025	2.87	1.56	–	665	-0.100	–	–	0.03⁽¹⁾
Almeida et al.	2025	2.87	1.56	–	665	–	5128	–	–
Zhang et al.	2024	–	–	–	–	-0.247⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	6152⁽¹⁾	–	–
Cavallo et al.	2024	2.92	1.49	–	708	0.140	–	–	–
Hunt & Reffert	2023	3.13	1.27	0.82	511	–	–	–	–
Just et al.	2023	–	–	–	631	–	1127	–	–
Jaehnig et al.	2021	3.43⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.42	1.18	–	324	–	–	–	0
Dias et al.	2021	2.87	1.56	–	665	-0.067	–	–	–
Cantat-Gaudin et al.	2020	3.50	1.36	–	339	–	–	–	–
Cantat-Gaudin & Anders	2020	3.42	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	692	0.250	–	–	–
Soubiran et al.	2018	3.42	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.42	–	–	–	–	–	–	–
Loktin & Popova	2017	3.62	1.16	–	339	–	–	–	–
Kharchenko et al.	2016	2.80	1.55	–	631	–	–	–	–
Kharchenko et al.	2013	2.80	1.55	–	631	–	–	–	–
Gozha et al.	2012	3.78	–	–	327	-0.270	–	–	–
van den Bergh	2006	3.78	1.18	–	331	–	–	–	–
Dias et al.	2002	3.78	1.19	–	327	-0.080	–	–	–

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

Visualization

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