Melotte 155

(Collinder 317; VDBH 204; NGC 6242; OCL 1001; vdBergh-Hagen 204; ESO 332 10; MWSC 2488; FoF 1621)

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) 791

Stellar density (N₅₀/rad) 103.0 [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 155 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, 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 Massive 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 155 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–	253.874	-39.475	0.766	1.119	-0.865	-7.045
Li et al.	2025	253.878	-39.474	0.755	1.149	-0.825	–
Almeida et al.	2025	253.88	-39.476	–	–	–	–
Hunt & Reffert	2024	253.878	-39.466	0.772	1.107	-0.858	-5.187
Cavallo et al.	2024	253.869	-39.485	0.771	–	–	–
Hunt & Reffert	2023	253.878	-39.466	0.772	1.107	-0.858	-5.187
Almeida et al.	2023	253.844	-39.473	–	–	–	–
Cordoni et al.	2023	253.88	-39.476	0.752	1.16	-0.817	–
Tarricq et al.	2022	253.868	-39.472	0.757	1.112	-0.872	–
Jaehnig et al.	2021	253.883	-39.464	0.785	1.144	-0.84	–
Rain et al.	2021	253.878	-39.474	0.755	1.149	-0.825	–
Dias et al.	2021	253.88	-39.476	0.752	1.16	-0.817	–
Cantat-Gaudin et al.	2020	253.878	-39.474	0.755	1.149	-0.825	–
Sánchez et al.	2020	253.887	-39.462	–	1.118	-1.023	–
Cantat-Gaudin & Anders	2020	253.878	-39.474	0.755	1.149	-0.825	–
Liu & Pang	2019	253.887	-39.484	0.786	1.153	-0.834	–
Bossini et al.	2019	253.878	-39.474	–	–	–	–
Soubiran et al.	2018	253.878	-39.474	–	–	–	-7.03
Bica et al.	2019	253.886	-39.472	–	–	–	–
Cantat-Gaudin et al.	2018	253.878	-39.474	0.755	1.149	-0.825	–
Loktin & Popova	2017	253.89	-39.463	–	-2.927	0.266	-7.1
Dias et al.	2014	253.887	-39.462	–	-0.05	-0.42	–
Piskunov et al.	2008	253.884	-39.458	–	–	–	–
Piskunov et al.	2007	253.884	-39.458	–	–	–	–
van den Bergh	2006	253.9	-39.467	–	–	–	–
Kharchenko et al.	2005	253.89	-39.46	–	0.63	-0.26	–
Kharchenko et al.	2003	253.87	-39.47	–	0.38	-0.19	–
Dias et al.	2002	253.887	-39.462	–	-0.05	-0.42	-7.1
Dambis	1999	253.9	-39.467	–	–	–	–

💡 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–	1.17	1.18	0.56	59	0.034	1571	0.4	0.0
Li et al.	2025	1.10	1.28	–	67	-0.145	–	–	–
Almeida et al.	2025	1.17	1.36	–	59	–	1613	–	–
Hunt & Reffert	2024	–	–	–	–	–	2974⁽¹⁾	–	–
Cavallo et al.	2024	1.26	1.26	–	107	0.310	–	–	–
Hunt & Reffert	2023	1.22	1.23	0.56	79	–	–	–	–
Almeida et al.	2023	1.22	1.37	–	68	0.126	1529⁽¹⁾	0.48	–
Cordoni et al.	2023	1.17	1.36	–	59	0.034	3916	0.32	0.00
Tarricq et al.	2022	1.21	–	–	83	–	–	–	–
Jaehnig et al.	2021	1.27⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.28	0.96	–	58	–	–	–	0
Dias et al.	2021	1.17	1.36	–	59	0.034	–	–	–
Cantat-Gaudin et al.	2020	1.25	1.03	–	78	–	–	–	–
Cantat-Gaudin & Anders	2020	1.28	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	32	-0.250	–	–	–
Bossini et al.	2019	1.19	0.99	–	58	0.000	–	–	–
Soubiran et al.	2018	1.28	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.28	–	–	–	–	–	–	–
Loktin & Popova	2017	1.14	1.17	–	40	–	–	–	–
Piskunov et al.	2008	1.13	1.18	–	43	–	807⁽¹⁾	–	–
Piskunov et al.	2007	1.13	1.18	–	43	–	229	–	–
van den Bergh	2006	1.13	1.18	–	41	–	–	–	–
Kharchenko et al.	2005	1.13	1.18	–	43	–	–	–	–
Kharchenko et al.	2003	1.13	1.18	–	–	–	–	–	–
Dias et al.	2002	1.13	1.17	–	41	–	–	–	–
Dambis	1999	1.02	1.21	–	63	–	–	–	–

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

Visualization

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