Melotte 93

(Collinder 200; VDBH 50; NGC 2670; MWSC 1554; OCL 764; vdBergh-Hagen 50; ESO 210 05; FoF 694)

0.92 UTI

0.83

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 320

Stellar density (N₅₀/rad) 35.3 [N/pc²]

C3 classification AB

C_N 0.83 Rich
C_dens 1.0 Very dense
C_C3 0.75 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 93 is a rich, very dense object of 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, intermediate-age 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 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 93 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–	131.388	-48.797	0.666	-5.356	3.667	19.38
Li et al.	2025	131.386	-48.801	0.647	-5.379	3.621	–
Wei et al.	2025	131.401	-48.803	0.657	-5.37	3.723	–
Almeida et al.	2025	131.375	-48.81	–	–	–	–
Hunt & Reffert	2024	131.369	-48.791	0.666	-5.36	3.678	14.814
Cavallo et al.	2024	131.374	-48.812	0.668	–	–	–
Hunt & Reffert	2023	131.369	-48.791	0.666	-5.36	3.678	14.814
Almeida et al.	2023	131.395	-48.783	–	–	–	–
Just et al.	2023	131.388	-48.817	–	–	–	–
Tarricq et al.	2022	131.404	-48.801	0.661	-5.349	3.692	–
Jaehnig et al.	2021	131.386	-48.796	0.681	-5.379	3.599	–
Rain et al.	2021	131.386	-48.801	0.647	-5.379	3.621	–
Dias et al.	2021	131.375	-48.81	0.651	-5.381	3.606	–
Cantat-Gaudin et al.	2020	131.386	-48.801	0.647	-5.379	3.621	–
Sánchez et al.	2020	131.375	-48.8	–	-5.356	3.635	–
Cantat-Gaudin & Anders	2020	131.386	-48.801	0.647	-5.379	3.621	–
Liu & Pang	2019	131.375	-48.795	0.653	-5.392	3.606	–
Soubiran et al.	2018	131.386	-48.801	–	–	–	5.15
Bica et al.	2019	131.385	-48.8	–	–	–	–
Cantat-Gaudin et al.	2018	131.386	-48.801	0.647	-5.379	3.621	–
Loktin & Popova	2017	131.37	-48.8	–	-6.15	5.74	17.2
Kharchenko et al.	2016	131.388	-48.817	–	–	–	–
Dias et al.	2014	131.375	-48.8	–	-6.15	5.74	–
Kharchenko et al.	2013	131.392	-48.82	–	-11.95	6.2	17.2
Gozha et al.	2012	131.375	-48.8	–	–	–	–
Piskunov et al.	2008	131.364	-48.799	–	–	–	–
van den Bergh	2006	131.375	-48.8	–	–	–	–
Kharchenko et al.	2005	131.37	-48.8	–	-11.97	4.86	–
Kharchenko et al.	2003	131.38	-48.78	–	-11.05	3.98	–
Dias et al.	2002	131.375	-48.8	–	-6.15	5.74	17.2

💡 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–	1.41	1.33	1.81	114	0.277	682	0.435	0.0
Li et al.	2025	1.21	1.16	–	253	-0.254	–	–	–
Wei et al.	2025	2.44	1.46	–	407	0.250	1054	0.34	–
Almeida et al.	2025	1.47	1.31	–	93	–	802	–	–
Hunt & Reffert	2024	–	–	–	–	–	1147⁽¹⁾	–	–
Cavallo et al.	2024	1.56	1.25	–	191	0.620	–	–	–
Hunt & Reffert	2023	1.41	1.50	1.81	105	–	–	–	–
Almeida et al.	2023	1.39	1.42	–	125	0.148	562⁽¹⁾	0.53	–
Just et al.	2023	–	–	–	138	–	28	–	–
Tarricq et al.	2022	1.46	–	–	123	–	–	–	–
Jaehnig et al.	2021	1.47⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.48	1.33	–	49	–	–	–	0
Dias et al.	2021	1.47	1.31	–	93	0.304	–	–	–
Cantat-Gaudin et al.	2020	1.51	1.08	–	102	–	–	–	–
Cantat-Gaudin & Anders	2020	1.48	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	63	0.500	–	–	–
Soubiran et al.	2018	1.48	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.48	–	–	–	–	–	–	–
Loktin & Popova	2017	1.19	1.33	–	49	–	–	–	–
Kharchenko et al.	2016	1.29	1.35	–	138	–	–	–	–
Kharchenko et al.	2013	1.29	1.35	–	138	–	–	–	–
Gozha et al.	2012	1.19	–	–	49	–	44	–	–
Piskunov et al.	2008	1.19	1.33	–	126	–	–	–	–
van den Bergh	2006	1.19	1.33	–	49	–	–	–	–
Kharchenko et al.	2005	1.19	1.33	–	126	–	–	–	–
Kharchenko et al.	2003	1.12	1.05	–	–	–	–	–	–
Dias et al.	2002	1.19	1.33	–	49	–	–	–	–

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

Visualization

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