Melotte 73

(Collinder 157; NGC 2432; FSR 1267; MWSC 1310; OCL 620; ESO 560 06; FoF 378)

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) 312

Stellar density (N₅₀/rad) 52.2 [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 73 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively 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 and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively 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 73 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–	115.223	-19.076	0.524	-0.689	1.622	49.641
Li et al.	2025	115.223	-19.078	0.493	-0.684	1.614	–
Hu & Soubiran	2025	115.229	-19.085	–	–	–	–
Almeida et al.	2025	115.222	-19.086	–	–	–	–
Hunt & Reffert	2024	115.22	-19.075	0.512	-0.691	1.631	44.935
Cavallo et al.	2024	115.229	-19.085	0.52	–	–	–
Hunt & Reffert	2023	115.22	-19.075	0.512	-0.691	1.631	44.935
Almeida et al.	2023	115.223	-19.085	–	–	–	–
Just et al.	2023	115.219	-19.083	–	–	–	–
Dias et al.	2021	115.222	-19.086	0.493	-0.69	1.611	51.48
Cantat-Gaudin et al.	2020	115.223	-19.078	0.493	-0.684	1.614	–
Sánchez et al.	2020	115.221	-19.077	–	-0.726	1.543	–
Cantat-Gaudin & Anders	2020	115.223	-19.078	0.493	-0.684	1.614	–
Liu & Pang	2019	115.218	-19.084	0.498	-0.725	1.616	–
Bossini et al.	2019	115.223	-19.078	–	–	–	–
Soubiran et al.	2018	115.223	-19.078	–	–	–	51.63
Bica et al.	2019	115.217	-19.066	–	–	–	–
Cantat-Gaudin et al.	2018	115.223	-19.078	0.493	-0.684	1.614	–
Loktin & Popova	2017	115.23	-19.082	–	-3.128	4.184	14.4
Kharchenko et al.	2016	115.219	-19.083	–	–	–	–
Dias et al.	2014	115.221	-19.077	–	-0.85	1.42	–
Kharchenko et al.	2013	115.225	-19.085	–	-2.65	3.62	14.4
Gozha et al.	2012	115.221	-19.077	–	–	–	–
Piskunov et al.	2008	115.316	-19.151	–	–	–	–
Kharchenko et al.	2007	115.21	-19.08	–	0.2	–	14.4
Froebrich et al.	2007	115.237	-19.073	–	–	–	–
van den Bergh	2006	115.325	-19.15	–	–	–	–
Kharchenko et al.	2005	115.32	-19.15	–	-3.68	1.62	14.4
Kharchenko et al.	2003	115.29	-19.12	–	-5.64	1.27	–
Dias et al.	2002	115.221	-19.077	–	-0.85	1.42	14.4

💡 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–	1.91	0.725	1.02	698	0.000	705	0.45	–
Li et al.	2025	1.71	0.81	–	1065	-0.144	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.140⁽⁵⁾	–	–	–
Almeida et al.	2025	1.65	0.73	–	935	–	640	–	–
Hunt & Reffert	2024	–	–	–	–	–	1101⁽¹⁾	–	–
Cavallo et al.	2024	1.96	0.97	–	776	0.160	–	–	–
Hunt & Reffert	2023	1.75	0.43	1.02	975	–	–	–	–
Almeida et al.	2023	1.73	0.77	–	929	-0.003	705⁽¹⁾	0.45	–
Just et al.	2023	–	–	–	447	–	140	–	–
Dias et al.	2021	1.65	0.73	–	935	0.014	–	–	–
Cantat-Gaudin et al.	2020	1.91	0.72	–	692	–	–	–	–
Cantat-Gaudin & Anders	2020	1.92	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	955	0.000	–	–	–
Bossini et al.	2019	1.98	0.74	–	705	0.000	–	–	–
Soubiran et al.	2018	1.92	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.92	–	–	–	–	–	–	–
Loktin & Popova	2017	2.47	0.06	–	851	–	–	–	–
Kharchenko et al.	2016	1.59	0.90	–	447	–	–	–	–
Kharchenko et al.	2013	1.59	0.90	–	447	–	–	–	–
Gozha et al.	2012	1.90	–	–	501	–	2042	–	–
Piskunov et al.	2008	2.03	0.37	–	151	–	–	–	–
van den Bergh	2006	1.91	0.71	–	631	–	–	–	–
Kharchenko et al.	2005	2.03	0.37	–	151	–	–	–	–
Kharchenko et al.	2003	1.91	0.71	–	–	–	–	–	–
Dias et al.	2002	1.90	0.71	–	501	–	–	–	–

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

Visualization

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