Collinder 390

(NGC 6704; MWSC 3007; OCL 82)

0.96 UTI

0.8

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 232

Stellar density (N₅₀/rad) 78.9 [N/pc²]

C3 classification AA

C_N 0.8 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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Collinder 390 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate 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 Collinder 390 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–	282.687	-5.198	0.424	-0.704	-3.176	26.116
Li et al.	2025	282.687	-5.203	0.434	-0.73	-3.139	–
Almeida et al.	2025	282.686	-5.2	–	–	–	–
Hunt & Reffert	2024	282.688	-5.199	0.415	-0.706	-3.202	28.505
Cavallo et al.	2024	282.689	-5.194	0.415	–	–	–
Hunt & Reffert	2023	282.688	-5.199	0.415	-0.706	-3.202	28.505
Just et al.	2023	282.679	-5.212	–	–	–	–
Jaehnig et al.	2021	282.688	-5.206	0.462	-0.725	-3.146	–
Rain et al.	2021	282.687	-5.203	0.434	-0.73	-3.139	–
Dias et al.	2021	282.686	-5.2	0.439	-0.728	-3.14	–
Cantat-Gaudin et al.	2020	282.687	-5.203	0.434	-0.73	-3.139	–
Sánchez et al.	2020	282.688	-5.205	–	-0.714	-3.009	–
Cantat-Gaudin & Anders	2020	282.687	-5.203	0.434	-0.73	-3.139	–
Bossini et al.	2019	282.687	-5.203	–	–	–	–
Soubiran et al.	2018	282.687	-5.203	–	–	–	25.49
Bica et al.	2019	282.681	-5.2	–	–	–	–
Cantat-Gaudin et al.	2018	282.687	-5.203	0.434	-0.73	-3.139	–
Loktin & Popova	2017	282.675	-5.21	–	0.197	-6.858	–
Kharchenko et al.	2016	282.679	-5.212	–	–	–	–
Dias et al.	2014	282.688	-5.205	–	-1.69	-2.04	–
Kharchenko et al.	2013	282.687	-5.21	–	-0.98	-2.67	–
van den Bergh	2006	282.725	-5.2	–	–	–	–
Dias et al.	2002	282.688	-5.205	–	-1.69	-2.04	–

💡 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–	2.16	2.29	1.46	119	0.212	730	–	0.0
Li et al.	2025	1.62	2.29	–	356	0.152	–	–	–
Almeida et al.	2025	1.76	2.45	–	121	–	730	–	–
Hunt & Reffert	2024	–	–	–	–	–	2225⁽¹⁾	–	–
Cavallo et al.	2024	2.39	2.83	–	117	0.660	–	–	–
Hunt & Reffert	2023	2.16	2.68	1.46	169	–	–	–	–
Just et al.	2023	–	–	–	100	–	261	–	–
Jaehnig et al.	2021	2.14⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.16	2.23	–	170	–	–	–	0
Dias et al.	2021	1.76	2.45	–	121	0.273	–	–	–
Cantat-Gaudin et al.	2020	2.04	2.23	–	200	–	–	–	–
Cantat-Gaudin & Anders	2020	2.16	–	–	–	–	–	–	–
Bossini et al.	2019	2.27	2.26	–	173	0.000	–	–	–
Soubiran et al.	2018	2.16	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.16	–	–	–	–	–	–	–
Loktin & Popova	2017	2.96	2.22	–	74	–	–	–	–
Kharchenko et al.	2016	2.18	2.97	–	100	–	–	–	–
Kharchenko et al.	2013	2.18	2.97	–	100	–	–	–	–
van den Bergh	2006	2.97	2.23	–	72	–	–	–	–
Dias et al.	2002	2.97	2.22	–	73	–	–	–	–

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

Visualization

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