Melotte 91

(Collinder 194; Pismis 9; VDBH 46; NGC 2659; MWSC 1538; OCL 752; vdBergh-Hagen 46; ESO 260 03; FoF 118)

0.90 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 137

Stellar density (N₅₀/rad) 44.8 [N/pc²]

C3 classification AB

C_N 0.76 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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Melotte 91 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

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 91 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–	130.627	-45.002	0.466	-5.317	5.064	12.296
Li et al.	2025	130.634	-44.999	0.452	-5.336	5.028	–
Almeida et al.	2025	130.633	-44.998	–	–	–	–
Hunt & Reffert	2024	130.634	-45.0	0.47	-5.299	5.077	22.154
Cavallo et al.	2024	130.632	-44.991	0.471	–	–	–
Hunt & Reffert	2023	130.634	-45.0	0.47	-5.299	5.077	22.154
Almeida et al.	2023	130.627	-45.009	–	–	–	–
Just et al.	2023	130.637	-44.983	–	–	–	–
Dias et al.	2021	130.633	-44.998	0.435	-5.364	5.028	–
Cantat-Gaudin et al.	2020	130.634	-44.999	0.452	-5.336	5.028	–
Cantat-Gaudin & Anders	2020	130.634	-44.999	0.452	-5.336	5.028	–
Liu & Pang	2019	130.626	-45.012	0.452	-5.309	5.003	–
Bossini et al.	2019	130.634	-44.999	–	–	–	–
Soubiran et al.	2018	130.634	-44.999	–	–	–	16.55
Bica et al.	2019	130.671	-44.95	–	–	–	–
Cantat-Gaudin et al.	2018	130.634	-44.999	0.452	-5.336	5.028	–
Loktin & Popova	2017	130.65	-44.983	–	-2.495	5.562	–
Kharchenko et al.	2016	130.637	-44.983	–	–	–	–
Dias et al.	2014	130.654	-44.983	–	-2.09	1.99	–
Kharchenko et al.	2013	130.642	-44.985	–	-6.0	5.3	–
Piskunov et al.	2008	130.647	-44.976	–	–	–	–
van den Bergh	2006	130.65	-44.983	–	–	–	–
Kharchenko et al.	2005	130.65	-44.98	–	-5.05	3.54	–
Kharchenko et al.	2003	130.66	-44.98	–	-6.72	2.94	–
Dias et al.	2002	130.654	-44.983	–	-2.09	1.99	–

💡 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–	1.81	1.555	0.86	27	0.002	424	0.74	–
Li et al.	2025	1.72	1.53	–	50	-0.135	–	–	–
Almeida et al.	2025	1.81	1.53	–	41	–	445	–	–
Hunt & Reffert	2024	–	–	–	–	–	472⁽¹⁾	–	–
Cavallo et al.	2024	2.01	1.47	–	74	0.420	–	–	–
Hunt & Reffert	2023	1.96	1.39	0.86	96	–	–	–	–
Almeida et al.	2023	1.91	1.60	–	35	0.003	404⁽¹⁾	0.74	–
Just et al.	2023	–	–	–	23	–	55	–	–
Dias et al.	2021	1.81	1.53	–	41	-0.080	–	–	–
Cantat-Gaudin et al.	2020	2.10	1.21	–	44	–	–	–	–
Cantat-Gaudin & Anders	2020	2.08	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	501	0.500	–	–	–
Bossini et al.	2019	2.30	1.49	–	27	0.000	–	–	–
Soubiran et al.	2018	2.08	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.08	–	–	–	–	–	–	–
Loktin & Popova	2017	1.78	1.47	–	10	–	–	–	–
Kharchenko et al.	2016	1.71	1.58	–	23	–	–	–	–
Kharchenko et al.	2013	1.71	1.58	–	23	–	–	–	–
Piskunov et al.	2008	1.71	1.58	–	17	–	–	–	–
van den Bergh	2006	1.71	1.58	–	8	–	–	–	–
Kharchenko et al.	2005	1.71	1.58	–	17	–	–	–	–
Kharchenko et al.	2003	1.72	1.58	–	–	–	–	–	–
Dias et al.	2002	1.71	1.59	–	8	–	–	–	–

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

Visualization

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