Melotte 64

(Collinder 134; NGC 2360; MWSC 1165; OCL 589; FSR 1225; FoF 2083)

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) 1227

Stellar density (N₅₀/rad) 86.2 [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 64 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near 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 absorption, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a very small percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Low 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 64 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–	109.44	-15.631	0.917	0.376	5.628	27.693
Li et al.	2025	109.443	-15.631	0.902	0.383	5.603	–
Hu & Soubiran	2025	109.436	-15.633	–	–	–	–
Wei et al.	2025	109.44	-15.635	0.918	0.382	5.63	–
Almeida et al.	2025	109.44	-15.63	–	–	–	–
Hunt & Reffert	2024	109.441	-15.644	0.917	0.385	5.629	27.246
Cavallo et al.	2024	109.436	-15.633	0.916	–	–	–
Hunt & Reffert	2023	109.441	-15.644	0.917	0.385	5.629	27.246
Almeida et al.	2023	109.438	-15.628	–	–	–	–
Cordoni et al.	2023	109.44	-15.63	0.9	0.389	5.608	–
Just et al.	2023	109.419	-15.638	–	–	–	–
He et al.	2022	109.435	-15.635	0.918	0.389	5.634	–
Tarricq et al.	2022	109.44	-15.639	0.924	0.376	5.63	–
Jaehnig et al.	2021	109.444	-15.637	0.931	0.363	5.591	–
Rain et al.	2021	109.443	-15.631	0.902	0.383	5.603	–
Dias et al.	2021	109.44	-15.63	0.9	0.389	5.608	28.386
Cantat-Gaudin et al.	2020	109.443	-15.631	0.902	0.383	5.603	–
Cantat-Gaudin & Anders	2020	109.443	-15.631	0.902	0.383	5.603	–
Liu & Pang	2019	109.442	-15.626	0.903	0.393	5.595	–
Soubiran et al.	2018	109.443	-15.631	–	–	–	28.3
Bica et al.	2019	109.455	-15.654	–	–	–	–
Cantat-Gaudin et al.	2018	109.443	-15.631	0.902	0.383	5.603	–
Loktin & Popova	2017	109.425	-15.641	–	-1.792	6.032	25.5
Kharchenko et al.	2016	109.419	-15.638	–	–	–	–
Dias et al.	2014	109.429	-15.642	–	-1.51	5.27	–
Kharchenko et al.	2013	109.425	-15.64	–	-2.3	6.6	25.5
Gozha et al.	2012	109.429	-15.642	–	–	–	–
Piskunov et al.	2008	109.422	-15.637	–	–	–	–
Kharchenko et al.	2007	109.42	-15.64	–	0.25	–	25.47
Piskunov et al.	2007	109.422	-15.637	–	–	–	–
van den Bergh	2006	109.425	-15.633	–	–	–	–
Kharchenko et al.	2005	109.42	-15.64	–	-2.62	4.89	25.47
Kharchenko et al.	2003	109.44	-15.63	–	-2.6	4.82	–
Chen et al.	2003	109.436	-15.63	–	3.51	8.07	27.2
Dias et al.	2002	109.429	-15.642	–	-3.51	8.07	27.28

💡 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–	1.1	0.35	0.34	761	-0.064	1327	0.41	0.0
Li et al.	2025	1.02	0.41	–	1361	-0.175	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.210⁽⁵⁾	–	–	–
Wei et al.	2025	1.11	0.49	–	1410	-0.250	1589	0.30	–
Almeida et al.	2025	1.05	0.41	–	1268	–	1671	–	–
Hunt & Reffert	2024	–	–	–	–	–	2771⁽¹⁾	–	–
Cavallo et al.	2024	1.09	0.35	–	1175	0.290	–	–	–
Hunt & Reffert	2023	1.01	0.12	0.34	1452	–	–	–	–
Almeida et al.	2023	1.04	0.40	–	1276	-0.083	1327⁽¹⁾	0.41	–
Cordoni et al.	2023	1.05	0.41	–	1268	-0.045	1656	0.41	0.00
Just et al.	2023	–	–	–	447	–	543	–	–
He et al.	2022	–	0.55	–	891	–	–	–	–
Tarricq et al.	2022	1.09	–	–	1000	–	–	–	–
Jaehnig et al.	2021	1.07⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.07	0.03	–	631	–	–	–	1
Dias et al.	2021	1.05	0.41	–	1268	-0.045	–	–	–
Cantat-Gaudin et al.	2020	1.12	0.39	–	1023	–	–	–	–
Cantat-Gaudin & Anders	2020	1.07	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1410	-0.250	–	–	–
Soubiran et al.	2018	1.07	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.07	–	–	–	–	–	–	–
Loktin & Popova	2017	1.89	0.34	–	592	–	–	–	–
Kharchenko et al.	2016	1.56	1.29	–	447	–	–	–	–
Kharchenko et al.	2013	1.56	1.29	–	447	-0.030	–	–	–
Gozha et al.	2012	1.89	–	–	561	-0.030	1000	–	–
Piskunov et al.	2008	1.89	0.34	–	389	–	955⁽¹⁾	–	–
Piskunov et al.	2007	1.89	0.34	–	389	–	255	–	–
van den Bergh	2006	1.89	0.34	–	562	–	–	–	–
Kharchenko et al.	2005	1.89	0.34	–	389	–	–	–	–
Kharchenko et al.	2003	1.89	0.34	–	–	–	–	–	–
Chen et al.	2003	1.89	0.34	–	560	-0.150⁽¹⁾	–	–	–
Dias et al.	2002	1.12	0.03	–	631	-0.030	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0391	3.6	109.45	-15.63	0.98	0.41	5.55	27.51	0.0
HSC 1815	1.8	109.44	-15.78	1.1	0.49	5.45	–	0.02

💡 Note: The % column shows the percentage of members that Melotte 64 shares with each listed object.

Visualization

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