Melotte 123

(Collinder 280; NGC 5460; OCL 925; ESO 221 24; MWSC 2202; FoF 2360)

0.96 UTI

0.81

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 250

Stellar density (N₅₀/rad) 21.4 [N/pc²]

C3 classification AA

C_N 0.81 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 123 is a rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Close Low extinction 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 123 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–	211.877	-48.302	1.37	-6.639	-3.393	-11.406
Li et al.	2025	211.847	-48.285	1.34	-6.599	-3.454	–
Almeida et al.	2025	211.831	-48.301	–	–	–	–
Alfonso et al.	2024	211.879	-48.297	1.33	-6.643	-3.393	–
Hunt & Reffert	2024	211.817	-48.303	1.357	-6.652	-3.398	-10.097
Cavallo et al.	2024	211.808	-48.293	1.369	–	–	–
Hunt & Reffert	2023	211.817	-48.303	1.357	-6.652	-3.398	-10.097
Almeida et al.	2023	211.821	-48.307	–	–	–	–
He et al.	2022	211.838	-48.259	1.373	-6.644	-3.39	–
Tarricq et al.	2022	211.866	-48.329	1.365	-6.632	-3.385	–
Jaehnig et al.	2021	211.827	-48.282	1.371	-6.586	-3.465	–
Rain et al.	2021	211.847	-48.285	1.34	-6.599	-3.454	–
Dias et al.	2021	211.831	-48.301	1.336	-6.635	-3.434	-7.297
Cantat-Gaudin et al.	2020	211.847	-48.285	1.34	-6.599	-3.454	–
Cantat-Gaudin & Anders	2020	211.847	-48.285	1.34	-6.599	-3.454	–
Liu & Pang	2019	211.815	-48.283	1.337	-6.637	-3.467	–
Bossini et al.	2019	211.847	-48.285	–	–	–	–
Soubiran et al.	2018	211.847	-48.285	–	–	–	-4.61
Bica et al.	2019	211.89	-48.325	–	–	–	–
Cantat-Gaudin et al.	2018	211.847	-48.285	1.34	-6.599	-3.454	–
Loktin & Popova	2017	211.86	-48.343	–	-6.523	-0.662	-12.3
Dias et al.	2014	211.863	-48.343	–	-5.07	2.31	–
Gozha et al.	2012	211.862	-48.343	–	–	–	–
Piskunov et al.	2008	211.848	-48.334	–	–	–	–
Kharchenko et al.	2007	211.86	-48.34	–	0.38	–	-12.31
Piskunov et al.	2007	211.848	-48.334	–	–	–	–
van den Bergh	2006	211.85	-48.333	–	–	–	–
Kharchenko et al.	2005	211.86	-48.34	–	-5.7	-3.58	-12.7
Kharchenko et al.	2003	211.86	-48.32	–	-5.47	-3.77	–
Chen et al.	2003	211.95	-48.355	–	-7.04	-3.23	-14.0
Dias et al.	2002	211.863	-48.343	–	-5.07	2.31	-17.9

💡 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–	0.71	0.295	0.51	161	0.030	360	0.49	0.0
Li et al.	2025	0.72	0.32	–	262	0.046	–	–	–
Almeida et al.	2025	0.71	0.49	–	152	–	341	–	–
Alfonso et al.	2024	0.72	0.30	–	260	-0.001	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	447⁽¹⁾	–	–
Cavallo et al.	2024	0.72	0.32	–	186	0.420	–	–	–
Hunt & Reffert	2023	0.69	0.18	0.51	153	–	–	–	–
Almeida et al.	2023	0.71	0.47	–	177	-0.052	379⁽¹⁾	0.49	–
He et al.	2022	–	0.50	–	79	–	–	–	–
Tarricq et al.	2022	0.71	–	–	170	–	–	–	–
Jaehnig et al.	2021	0.73⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	0.73	0.28	–	129	–	–	–	0
Dias et al.	2021	0.71	0.49	–	152	-0.001	–	–	–
Cantat-Gaudin et al.	2020	0.72	0.30	–	158	–	–	–	–
Cantat-Gaudin & Anders	2020	0.73	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	47	0.250	–	–	–
Bossini et al.	2019	0.71	0.33	–	129	0.030	–	–	–
Soubiran et al.	2018	0.73	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.73	–	–	–	–	–	–	–
Loktin & Popova	2017	0.68	0.29	–	161	–	–	–	–
Gozha et al.	2012	0.68	–	–	161	0.050	170	–	–
Piskunov et al.	2008	0.67	0.28	–	204	–	505⁽¹⁾	–	–
Piskunov et al.	2007	0.67	0.28	–	204	–	217	–	–
van den Bergh	2006	0.68	0.28	–	162	–	–	–	–
Kharchenko et al.	2005	0.67	0.28	–	204	–	–	–	–
Kharchenko et al.	2003	0.68	0.28	–	–	–	–	–	–
Chen et al.	2003	0.68	–	–	160	–	–	–	–
Dias et al.	2002	0.70	0.29	–	158	-0.060	–	–	–

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

Visualization

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