Melotte 103

(Collinder 238; VDBH 109; NGC 3532; MWSC 1890; OCL 839; vdBergh-Hagen 109; ESO 128 31; FoF 2329; OCSN 236)

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) 3670

Stellar density (N₅₀/rad) 216.8 [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 103 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very 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 absorption, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Very close Low extinction Massive 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 103 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–	166.399	-58.696	2.086	-10.403	5.23	4.857
Nizovkina et al.	2025	166.394	-58.694	–	–	–	–
Li et al.	2025	166.417	-58.707	2.066	-10.385	5.175	–
Wei et al.	2025	166.4	-58.706	2.09	-10.399	5.238	–
Almeida et al.	2025	166.411	-58.722	–	–	–	–
Alfonso et al.	2024	166.387	-58.697	2.06	-10.408	5.248	–
Hunt & Reffert	2024	166.394	-58.694	2.088	-10.402	5.229	4.616
Cavallo et al.	2024	166.397	-58.712	2.089	–	–	–
Hunt & Reffert	2023	166.394	-58.694	2.088	-10.402	5.229	4.616
Cordoni et al.	2023	166.411	-58.722	2.062	-10.373	5.193	–
Qin et al.	2023	166.39	-58.69	2.09	-10.41	5.24	4.71
Just et al.	2023	166.448	-58.726	–	–	–	–
He et al.	2022	166.411	-58.716	2.089	-10.404	5.232	–
Tarricq et al.	2022	166.456	-58.68	2.096	-10.397	5.238	–
Jaehnig et al.	2021	166.428	-58.705	2.094	-10.43	5.189	–
Rain et al.	2021	166.417	-58.707	2.066	-10.385	5.175	–
Dias et al.	2021	166.411	-58.722	2.062	-10.373	5.193	5.492
Cantat-Gaudin et al.	2020	166.417	-58.707	2.066	-10.385	5.175	–
Cantat-Gaudin & Anders	2020	166.417	-58.707	2.066	-10.385	5.175	–
Liu & Pang	2019	166.393	-58.712	2.063	-10.374	5.202	–
Bossini et al.	2019	166.417	-58.707	–	–	–	–
Soubiran et al.	2018	166.417	-58.707	–	–	–	5.37
Bica et al.	2019	166.434	-58.776	–	–	–	–
Cantat-Gaudin et al.	2018	166.417	-58.707	2.066	-10.385	5.175	–
Loktin & Popova	2017	166.41	-58.753	–	-10.95	4.8	1.2
Kharchenko et al.	2016	166.448	-58.726	–	–	–	–
Dias et al.	2014	166.413	-58.753	–	-4.5	-1.26	–
Kharchenko et al.	2013	166.455	-58.73	–	-10.87	4.89	1.2
Gozha et al.	2012	166.412	-58.753	–	–	–	–
Piskunov et al.	2008	166.497	-58.725	–	–	–	–
Kharchenko et al.	2007	166.41	-58.75	–	0.6	–	-3.04
Piskunov et al.	2007	166.497	-58.725	–	–	–	–
van den Bergh	2006	166.387	-58.73	–	–	–	–
Kharchenko et al.	2005	166.5	-58.73	–	-10.54	4.57	-3.04
Kharchenko et al.	2003	166.42	-58.74	–	-10.47	4.05	–
Chen et al.	2003	166.476	-58.688	–	-10.7	5.26	7.0
Dias et al.	2002	166.412	-58.753	–	-10.95	4.8	4.33

💡 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–	0.48	0.12	0.56	310	0.020	1448	0.31	0.0
Nizovkina et al.	2025	0.43⁽⁴⁾	0.06⁽⁴⁾	–	592⁽⁴⁾	-0.089⁽⁴⁾	–	–	–
Li et al.	2025	0.49	0.06	–	481	0.145	–	–	–
Wei et al.	2025	0.46	0.20	–	288	0.000	2718	0.45	–
Almeida et al.	2025	0.48	0.14	–	413	–	2921	–	–
Alfonso et al.	2024	0.50	0.01	–	652	0.058	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	4875⁽¹⁾	–	–
Cavallo et al.	2024	0.48	0.33	–	224	0.280	–	–	–
Hunt & Reffert	2023	0.45	0.12	0.56	238	–	–	–	–
Cordoni et al.	2023	0.48	0.14	–	413	0.050	2243	0.17	0.00
Qin et al.	2023	0.52	0.22	–	282	–	–	–	–
Just et al.	2023	–	–	–	447	–	36	–	–
He et al.	2022	–	0.35	–	282	–	–	–	–
Tarricq et al.	2022	0.50	–	–	398	–	–	–	–
Jaehnig et al.	2021	0.48⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	0.48	0.06	–	398	–	–	–	0
Dias et al.	2021	0.48	0.14	–	413	0.050	–	–	–
Cantat-Gaudin et al.	2020	0.50	0.00	–	398	–	–	–	–
Cantat-Gaudin & Anders	2020	0.48	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	282	0.250	–	–	–
Bossini et al.	2019	0.49	0.07	–	399	0.000	–	–	–
Soubiran et al.	2018	0.48	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.48	–	–	–	–	–	–	–
Loktin & Popova	2017	0.50	0.11	–	310	–	–	–	–
Kharchenko et al.	2016	0.45	0.13	–	447	–	–	–	–
Kharchenko et al.	2013	0.45	0.13	–	447	0.019	–	–	–
Gozha et al.	2012	0.49	–	–	310	-0.020	363	–	–
Piskunov et al.	2008	0.50	0.12	–	282	–	653⁽¹⁾	–	–
Piskunov et al.	2007	0.50	0.12	–	282	–	330	–	–
van den Bergh	2006	0.49	0.12	–	309	–	–	–	–
Kharchenko et al.	2005	0.50	0.12	–	282	–	–	–	–
Kharchenko et al.	2003	0.40	0.12	–	–	–	–	–	–
Chen et al.	2003	0.49	0.11	–	310	-0.020⁽¹⁾	–	–	–
Dias et al.	2002	0.49	0.09	–	300	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 0552	0.7	166.34	-58.1	2.08	-10.34	5.29	5.44	0.0

💡 Note: The % column shows the percentage of members that Melotte 103 shares with each listed object.

Visualization

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