Melotte 187

(Collinder 361; VDBH 255; NGC 6520; MWSC 2790; OCL 10; vdBergh-Hagen 255; ESO 456 42; FoF 717)

0.96 UTI

0.82

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 275

Stellar density (N₅₀/rad) 127.6 [N/pc²]

C3 classification AA

C_N 0.82 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 187 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below 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 age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 187 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–	270.854	-27.886	0.555	0.707	-0.523	-23.497
Li et al.	2025	270.856	-27.884	0.556	0.688	-0.418	–
Almeida et al.	2025	270.855	-27.88	–	–	–	–
Hunt & Reffert	2024	270.858	-27.886	0.555	0.715	-0.544	-28.604
Cavallo et al.	2024	270.859	-27.883	0.555	–	–	–
Hunt & Reffert	2023	270.858	-27.886	0.555	0.715	-0.544	-28.604
Almeida et al.	2023	270.855	-27.882	–	–	–	–
Just et al.	2023	270.853	-27.896	–	–	–	–
Jaehnig et al.	2021	270.856	-27.88	0.588	0.695	-0.525	–
Rain et al.	2021	270.856	-27.884	0.556	0.688	-0.418	–
Dias et al.	2021	270.855	-27.88	0.544	0.702	-0.407	–
Cantat-Gaudin et al.	2020	270.856	-27.884	0.556	0.688	-0.418	–
Sánchez et al.	2020	270.85	-27.888	–	0.477	-0.72	–
Cantat-Gaudin & Anders	2020	270.856	-27.884	0.556	0.688	-0.418	–
Liu & Pang	2019	270.858	-27.88	0.565	0.676	-0.534	–
Soubiran et al.	2018	270.856	-27.884	–	–	–	-22.35
Bica et al.	2019	270.846	-27.888	–	–	–	–
Cantat-Gaudin et al.	2018	270.856	-27.884	0.556	0.688	-0.418	–
Loktin & Popova	2017	270.855	-27.889	–	2.011	-5.553	-26.0
Kharchenko et al.	2016	270.853	-27.896	–	–	–	–
Dias et al.	2014	270.85	-27.888	–	1.11	-3.81	–
Kharchenko et al.	2013	270.862	-27.895	–	1.27	-4.0	-26.0
Gozha et al.	2012	270.85	-27.888	–	–	–	–
Piskunov et al.	2008	270.846	-27.887	–	–	–	–
Kharchenko et al.	2007	270.85	-27.89	–	0.11	–	-26.0
van den Bergh	2006	270.85	-27.883	–	–	–	–
Kharchenko et al.	2005	270.85	-27.89	–	3.54	-1.74	-26.0
Kharchenko et al.	2003	270.84	-27.89	–	3.71	-2.83	–
Dias et al.	2002	270.85	-27.888	–	0.69	-2.65	-23.54

💡 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–	1.68	1.31	1.83	57	-0.112	314	0.63	0.0
Li et al.	2025	1.37	1.20	–	128	-0.336	–	–	–
Almeida et al.	2025	1.70	1.54	–	22	–	314	–	–
Hunt & Reffert	2024	–	–	–	–	–	3093⁽¹⁾	–	–
Cavallo et al.	2024	1.77	2.06	–	37	-0.490	–	–	–
Hunt & Reffert	2023	1.74	1.14	1.83	108	–	–	–	–
Almeida et al.	2023	1.57	1.34	–	86	0.162	555⁽¹⁾	0.63	–
Just et al.	2023	–	–	–	57	–	40	–	–
Jaehnig et al.	2021	1.68⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.71	1.30	–	151	–	–	–	0
Dias et al.	2021	1.70	1.54	–	22	0.027	–	–	–
Cantat-Gaudin et al.	2020	1.66	0.88	–	123	–	–	–	–
Cantat-Gaudin & Anders	2020	1.71	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	52	0.250	–	–	–
Soubiran et al.	2018	1.71	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.71	–	–	–	–	–	–	–
Loktin & Popova	2017	1.58	1.32	–	55	–	–	–	–
Kharchenko et al.	2016	1.47	1.55	–	57	–	–	–	–
Kharchenko et al.	2013	1.47	1.55	–	57	–	–	–	–
Gozha et al.	2012	1.90	–	–	151	-0.250	54	–	–
Piskunov et al.	2008	1.58	1.30	–	56	–	–	–	–
van den Bergh	2006	1.58	1.33	–	52	–	–	–	–
Kharchenko et al.	2005	1.58	1.30	–	56	–	–	–	–
Kharchenko et al.	2003	1.58	1.08	–	–	–	–	–	–
Dias et al.	2002	1.90	1.30	–	151	–	–	–	–

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

Visualization

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