Melotte 188

(Collinder 363; NGC 6531; MWSC 2796; M 21; OCL 26; ESO 521 19)

0.96 UTI

0.79

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 205

Stellar density (N₅₀/rad) 70.1 [N/pc²]

C3 classification AA

C_N 0.79 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 188 is a 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 near-solar metallicity, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Relatively close Low extinction Near-solar metallicity Very 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 188 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–	271.046	-22.503	0.799	0.542	-1.45	-4.885
Almeida et al.	2025	271.031	-22.515	–	–	–	–
Hunt & Reffert	2024	271.042	-22.5	0.801	0.538	-1.464	-5.191
Celli et al.	2024	271.036	-22.505	–	–	–	–
Cavallo et al.	2024	271.041	-22.523	0.798	–	–	–
Hunt & Reffert	2023	271.042	-22.5	0.801	0.538	-1.464	-5.191
Just et al.	2023	271.042	-22.491	–	–	–	–
He et al.	2022	271.036	-22.511	0.807	0.535	-1.476	–
Jaehnig et al.	2021	271.05	-22.495	0.841	0.472	-1.397	–
Rain et al.	2021	271.036	-22.505	0.798	0.525	-1.521	–
Dias et al.	2021	271.031	-22.515	0.797	0.537	-1.536	–
Cantat-Gaudin et al.	2020	271.036	-22.505	0.798	0.525	-1.521	–
Sánchez et al.	2020	271.054	-22.49	–	0.597	-1.404	–
Cantat-Gaudin & Anders	2020	271.036	-22.505	0.798	0.525	-1.521	–
Bossini et al.	2019	271.036	-22.505	–	–	–	–
Bica et al.	2019	271.046	-22.494	–	–	–	–
Cantat-Gaudin et al.	2018	271.036	-22.505	0.798	0.525	-1.521	–
Loktin & Popova	2017	271.05	-22.491	–	2.794	-2.952	-14.7
Kharchenko et al.	2016	271.042	-22.491	–	–	–	–
Dias et al.	2014	271.054	-22.49	–	0.55	0.15	–
Kharchenko et al.	2013	271.05	-22.49	–	2.43	-1.44	-14.7
Gozha et al.	2012	271.054	-22.49	–	–	–	–
Piskunov et al.	2008	271.046	-22.494	–	–	–	–
Kharchenko et al.	2007	271.05	-22.49	–	0.3	–	-14.71
Piskunov et al.	2007	271.046	-22.494	–	–	–	–
van den Bergh	2006	271.05	-22.483	–	–	–	–
Kharchenko et al.	2005	271.05	-22.49	–	0.26	-2.66	-14.71
Kharchenko et al.	2003	271.05	-22.49	–	-0.38	-2.47	–
Chen et al.	2003	271.109	-22.492	–	2.28	-3.05	-16.0
Dias et al.	2002	271.054	-22.49	–	2.28	-3.05	-13.49
Dambis	1999	271.054	-22.49	–	–	–	–

💡 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–	1.21	0.87	1.3	10	0.000	670	–	0.0
Almeida et al.	2025	1.16	0.99	–	13	–	446	–	–
Hunt & Reffert	2024	–	–	–	–	–	913⁽¹⁾	–	–
Celli et al.	2024	–	–	–	13	–	670	–	–
Cavallo et al.	2024	1.08	0.98	–	9	-0.130	–	–	–
Hunt & Reffert	2023	1.19	0.80	1.30	5	–	–	–	–
Just et al.	2023	–	–	–	7	–	117	–	–
He et al.	2022	–	1.10	–	6	–	–	–	–
Jaehnig et al.	2021	1.19⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.21	0.74	–	11	–	–	–	0
Dias et al.	2021	1.16	0.99	–	13	0.090	–	–	–
Cantat-Gaudin et al.	2020	1.16	0.67	–	13	–	–	–	–
Cantat-Gaudin & Anders	2020	1.21	–	–	–	–	–	–	–
Bossini et al.	2019	1.09	0.76	–	11	0.000	–	–	–
Cantat-Gaudin et al.	2018	1.21	–	–	–	–	–	–	–
Loktin & Popova	2017	1.21	0.87	–	12	–	–	–	–
Kharchenko et al.	2016	1.19	1.07	–	7	–	–	–	–
Kharchenko et al.	2013	1.19	1.07	–	7	–	–	–	–
Gozha et al.	2012	1.21	–	–	12	–	2512	–	–
Piskunov et al.	2008	1.21	0.87	–	7	–	783⁽¹⁾	–	–
Piskunov et al.	2007	1.21	0.87	–	7	–	170	–	–
van den Bergh	2006	1.21	0.87	–	12	–	–	–	–
Kharchenko et al.	2005	1.21	0.87	–	7	–	–	–	–
Kharchenko et al.	2003	1.21	0.78	–	–	–	–	–	–
Chen et al.	2003	1.21	–	–	10	–	–	–	–
Dias et al.	2002	1.21	0.87	–	12	–	–	–	–
Dambis	1999	1.03	0.86	–	4	–	–	–	–

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

Visualization

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