Melotte 122

(Collinder 279; VDBH 154; NGC 5316; MWSC 2175; OCL 913; vdBergh-Hagen 154; ESO 133 06)

0.97 UTI

0.87

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 431

Stellar density (N₅₀/rad) 41.3 [N/pc²]

C3 classification AA

C_N 0.87 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 122 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 massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. 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. Gold sample.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 122 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–	208.515	-61.877	0.675	-6.332	-1.509	-15.447
Li et al.	2025	208.516	-61.883	0.665	-6.297	-1.515	–
Wei et al.	2025	208.544	-61.886	0.688	-6.322	-1.529	–
Almeida et al.	2025	208.534	-61.886	–	–	–	–
Hunt & Reffert	2024	208.527	-61.866	0.673	-6.334	-1.507	-18.415
Cavallo et al.	2024	208.529	-61.884	0.674	–	–	–
Hunt & Reffert	2023	208.527	-61.866	0.673	-6.334	-1.507	-18.415
Almeida et al.	2023	208.567	-61.894	–	–	–	–
Cordoni et al.	2023	208.534	-61.886	0.666	-6.302	-1.513	–
Just et al.	2023	208.473	-61.867	–	–	–	–
Tarricq et al.	2022	208.479	-61.878	0.676	-6.341	-1.496	–
Jaehnig et al.	2021	208.498	-61.877	0.697	-6.3	-1.511	–
Rain et al.	2021	208.516	-61.883	0.665	-6.297	-1.515	–
Dias et al.	2021	208.534	-61.886	0.666	-6.302	-1.513	-14.501
Cantat-Gaudin et al.	2020	208.516	-61.883	0.665	-6.297	-1.515	–
Cantat-Gaudin & Anders	2020	208.516	-61.883	0.665	-6.297	-1.515	–
Bossini et al.	2019	208.516	-61.883	–	–	–	–
Soubiran et al.	2018	208.516	-61.883	–	–	–	-14.41
Bica et al.	2019	208.471	-61.875	–	–	–	–
Cantat-Gaudin et al.	2018	208.516	-61.883	0.665	-6.297	-1.515	–
Loktin & Popova	2017	208.485	-61.869	–	-8.036	-0.728	-15.1
Kharchenko et al.	2016	208.473	-61.867	–	–	–	–
Dias et al.	2014	208.487	-61.868	–	-4.36	-3.91	–
Kharchenko et al.	2013	208.485	-61.87	–	-6.3	-0.62	-15.1
Gozha et al.	2012	208.488	-61.868	–	–	–	–
Piskunov et al.	2008	208.466	-61.865	–	–	–	–
Piskunov et al.	2007	208.466	-61.865	–	–	–	–
van den Bergh	2006	208.475	-61.867	–	–	–	–
Kharchenko et al.	2005	208.48	-61.87	–	-4.91	-1.1	–
Kharchenko et al.	2003	208.48	-61.86	–	-6.03	0.76	–
Chen et al.	2003	208.466	-61.865	–	–	–	–
Dias et al.	2002	208.488	-61.868	–	-4.36	-3.91	-15.1

💡 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–	1.31	0.88	0.73	159	-0.020	1333	0.45	0.0
Li et al.	2025	1.29	1.00	–	173	-0.142	–	–	–
Wei et al.	2025	1.88	0.97	–	331	0.250	2008	0.45	–
Almeida et al.	2025	1.31	1.12	–	147	–	1333	–	–
Hunt & Reffert	2024	–	–	–	–	–	1632⁽¹⁾	–	–
Cavallo et al.	2024	1.32	1.04	–	269	-0.050	–	–	–
Hunt & Reffert	2023	1.40	0.88	0.73	230	–	–	–	–
Almeida et al.	2023	1.40	1.13	–	137	0.052	453⁽¹⁾	0.50	–
Cordoni et al.	2023	1.31	1.12	–	147	-0.022	4847	0.32	0.00
Just et al.	2023	–	–	–	170	–	137	–	–
Tarricq et al.	2022	1.40	–	–	191	–	–	–	–
Jaehnig et al.	2021	1.43⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.44	0.74	–	151	–	–	–	0
Dias et al.	2021	1.31	1.12	–	147	-0.022	–	–	–
Cantat-Gaudin et al.	2020	1.45	0.92	–	166	–	–	–	–
Cantat-Gaudin & Anders	2020	1.44	–	–	–	–	–	–	–
Bossini et al.	2019	1.44	0.77	–	153	0.130	–	–	–
Soubiran et al.	2018	1.44	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.44	–	–	–	–	–	–	–
Loktin & Popova	2017	1.22	0.82	–	163	–	–	–	–
Kharchenko et al.	2016	1.21	0.97	–	170	–	–	–	–
Kharchenko et al.	2013	1.21	0.97	–	170	0.045	–	–	–
Gozha et al.	2012	1.22	–	–	159	0.110	1096	–	–
Piskunov et al.	2008	1.22	0.84	–	155	–	1507⁽¹⁾	–	–
Piskunov et al.	2007	1.22	0.84	–	155	–	350	–	–
van den Bergh	2006	1.22	0.84	–	158	–	–	–	–
Kharchenko et al.	2005	1.22	0.84	–	155	–	–	–	–
Kharchenko et al.	2003	1.22	0.84	–	–	–	–	–	–
Chen et al.	2003	1.22	0.83	–	150	-0.020⁽¹⁾	–	–	–
Dias et al.	2002	1.22	0.83	–	159	-0.020	–	–	–

(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 0603	10.4	208.6	-61.95	0.67	-6.3	-1.49	-11.36	0.0

💡 Note: The % column shows the percentage of members that Melotte 122 shares with each listed object.

Visualization

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