Melotte 238

(Collinder 444; NGC 7209; MWSC 3585; OCL 215; FoF 2055)

0.97 UTI

0.86

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 395

Stellar density (N₅₀/rad) 10.8 [N/pc²]

C3 classification AA

C_N 0.86 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 238 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below 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. Gold sample.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Melotte 238 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–	331.227	46.51	0.817	2.296	0.267	-19.21
Li et al.	2025	331.224	46.508	0.82	2.255	0.283	–
Wei et al.	2025	331.229	46.49	0.821	2.304	0.278	–
Almeida et al.	2025	331.229	46.495	–	–	–	–
Hunt & Reffert	2024	331.228	46.531	0.816	2.294	0.265	-20.812
Cavallo et al.	2024	331.199	46.505	0.816	–	–	–
Hunt & Reffert	2023	331.228	46.531	0.816	2.294	0.265	-20.812
Almeida et al.	2023	331.192	46.521	–	–	–	–
Cordoni et al.	2023	331.229	46.495	0.824	2.264	0.292	–
Just et al.	2023	331.22	46.548	–	–	–	–
He et al.	2022	331.241	46.507	0.816	2.298	0.258	–
Tarricq et al.	2022	331.258	46.522	0.811	2.309	0.258	–
Jaehnig et al.	2021	331.281	46.508	0.847	2.293	0.313	–
Rain et al.	2021	331.224	46.508	0.82	2.255	0.283	–
Dias et al.	2021	331.229	46.495	0.824	2.264	0.292	-18.188
Cantat-Gaudin et al.	2020	331.224	46.508	0.82	2.255	0.283	–
Cantat-Gaudin & Anders	2020	331.224	46.508	0.82	2.255	0.283	–
Liu & Pang	2019	331.255	46.494	0.819	2.275	0.296	–
Bossini et al.	2019	331.224	46.508	–	–	–	–
Soubiran et al.	2018	331.224	46.508	–	–	–	-18.42
Bica et al.	2019	331.288	46.498	–	–	–	–
Cantat-Gaudin et al.	2018	331.224	46.508	0.82	2.255	0.283	–
Loktin & Popova	2017	331.275	46.483	–	-0.416	0.878	-9.7
Kharchenko et al.	2016	331.22	46.548	–	–	–	–
Dias et al.	2014	331.279	46.483	–	0.04	-0.16	–
Kharchenko et al.	2013	331.225	46.552	–	-0.97	3.79	-9.7
Gozha et al.	2012	331.279	46.483	–	–	–	–
Kharchenko et al.	2012	331.225	46.552	–	-0.97	3.79	-9.7
Piskunov et al.	2008	331.314	46.474	–	–	–	–
Kharchenko et al.	2007	331.27	46.48	–	0.25	–	-9.7
Piskunov et al.	2007	331.314	46.474	–	–	–	–
van den Bergh	2006	331.325	46.483	–	–	–	–
Kharchenko et al.	2005	331.32	46.48	–	2.49	1.62	–
Kharchenko et al.	2003	331.27	46.46	–	2.76	1.04	–
Chen et al.	2003	331.265	46.487	–	–	–	–
Dias et al.	2002	331.279	46.483	–	0.04	-0.16	-18.63

💡 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–	1.17	0.52	0.56	426	0.048	784	0.4	0.0
Li et al.	2025	1.18	0.44	–	541	0.245	–	–	–
Wei et al.	2025	1.32	0.38	–	550	0.500	1222	0.40	–
Almeida et al.	2025	1.15	0.61	–	494	–	784	–	–
Hunt & Reffert	2024	–	–	–	–	–	1250⁽¹⁾	–	–
Cavallo et al.	2024	1.22	0.69	–	339	0.200	–	–	–
Hunt & Reffert	2023	1.17	0.39	0.56	396	–	–	–	–
Almeida et al.	2023	1.18	0.70	–	422	0.048	1087⁽¹⁾	0.50	–
Cordoni et al.	2023	1.14	0.61	–	494	0.146	1489	0.29	0.00
Just et al.	2023	–	–	–	426	–	153	–	–
He et al.	2022	–	0.85	–	251	–	–	–	–
Tarricq et al.	2022	1.12	–	–	457	–	–	–	–
Jaehnig et al.	2021	1.18⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.18	0.53	–	339	–	–	–	0
Dias et al.	2021	1.15	0.61	–	494	0.146	–	–	–
Cantat-Gaudin et al.	2020	1.15	0.53	–	427	–	–	–	–
Cantat-Gaudin & Anders	2020	1.18	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	525	0.000	–	–	–
Bossini et al.	2019	1.17	0.55	–	341	0.070	–	–	–
Soubiran et al.	2018	1.18	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.18	–	–	–	–	–	–	–
Loktin & Popova	2017	1.20	0.49	–	412	–	–	–	–
Kharchenko et al.	2016	1.25	0.50	–	426	–	–	–	–
Kharchenko et al.	2013	1.25	0.50	–	426	-0.120	–	–	–
Gozha et al.	2012	1.17	–	–	414	-0.030	275	–	–
Kharchenko et al.	2012	1.25	0.50	–	426	-0.120	–	–	–
Piskunov et al.	2008	1.17	0.50	–	447	–	398⁽¹⁾	–	–
Piskunov et al.	2007	1.17	0.50	–	447	–	129	–	–
van den Bergh	2006	1.17	0.53	–	417	–	–	–	–
Kharchenko et al.	2005	1.17	0.50	–	447	–	–	–	–
Kharchenko et al.	2003	1.17	0.53	–	–	–	–	–	–
Chen et al.	2003	1.17	0.52	–	410	-0.120⁽¹⁾	–	–	–
Dias et al.	2002	1.17	0.52	–	414	-0.120	–	–	–

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

Visualization

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