Collinder 431

(NGC 7039; MWSC 3474; OCL 203)

0.91 UTI

0.81

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 247

Stellar density (N₅₀/rad) 70.5 [N/pc²]

C3 classification AB

C_N 0.81 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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Collinder 431 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is very well-studied in the literature.

Close Low extinction Near-solar metallicity Young

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 431 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–	317.664	45.598	1.321	-0.26	-2.582	-7.62
Li et al.	2025	317.663	45.597	1.293	-0.32	-2.542	–
Wei et al.	2025	317.745	45.612	1.32	-0.225	-2.588	–
Almeida et al.	2025	317.662	45.595	–	–	–	–
Alfonso et al.	2024	317.696	45.577	1.287	-0.239	-2.6	–
Hunt & Reffert	2024	317.653	45.582	1.318	-0.24	-2.626	-7.442
Celli et al.	2024	317.663	45.597	–	–	–	–
Cavallo et al.	2024	317.699	45.61	1.319	–	–	–
Hunt & Reffert	2023	317.653	45.582	1.318	-0.24	-2.626	-7.442
Almeida et al.	2023	317.655	45.586	–	–	–	–
Just et al.	2023	317.757	45.73	–	–	–	–
He et al.	2022	317.681	45.596	1.311	-0.254	-2.595	–
Rain et al.	2021	317.663	45.597	1.293	-0.32	-2.542	–
Dias et al.	2021	317.662	45.595	1.29	-0.249	-2.544	-8.512
Cantat-Gaudin et al.	2020	317.663	45.597	1.293	-0.32	-2.542	–
Cantat-Gaudin & Anders	2020	317.663	45.597	1.293	-0.32	-2.542	–
Soubiran et al.	2018	317.663	45.597	–	–	–	-10.59
Bica et al.	2019	317.755	45.65	–	–	–	–
Cantat-Gaudin et al.	2018	317.663	45.597	1.293	-0.32	-2.542	–
Loktin & Popova	2017	317.7	45.617	–	-1.316	-0.227	-11.6
Kharchenko et al.	2016	317.757	45.73	–	–	–	–
Dias et al.	2014	317.7	45.617	–	-2.43	-2.21	–
Kharchenko et al.	2013	317.763	45.733	–	-3.29	-0.48	-11.6
Gozha et al.	2012	317.7	45.617	–	–	–	–
Piskunov et al.	2008	317.695	45.621	–	–	–	–
Kharchenko et al.	2007	317.7	45.62	–	0.28	–	-11.6
van den Bergh	2006	317.7	45.617	–	–	–	–
Kharchenko et al.	2005	317.7	45.62	–	-1.68	-4.69	-11.0
Kharchenko et al.	2003	317.8	45.67	–	-1.87	-5.14	–
Dias et al.	2002	317.7	45.617	–	-0.48	-2.99	-12.2

💡 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–	0.77	0.4	1.09	22	-0.015	314	0.55	0.0
Li et al.	2025	0.68	0.38	–	13	-0.052	–	–	–
Wei et al.	2025	0.80	1.02	–	6	0.000	815	0.70	–
Almeida et al.	2025	0.76	0.56	–	16	–	314	–	–
Alfonso et al.	2024	0.76	0.28	–	18	0.091	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	183⁽¹⁾	–	–
Celli et al.	2024	–	–	–	22	–	215	–	–
Cavallo et al.	2024	0.78	0.98	–	5	-0.070	–	–	–
Hunt & Reffert	2023	0.73	0.26	1.09	7	–	–	–	–
Almeida et al.	2023	0.74	0.52	–	13	-0.031	218⁽¹⁾	0.40	–
Just et al.	2023	–	–	–	452	–	793	–	–
He et al.	2022	–	0.10	–	8	–	–	–	–
Rain et al.	2021	0.76	0.40	–	66	–	–	–	0
Dias et al.	2021	0.76	0.56	–	16	0.091	–	–	–
Cantat-Gaudin et al.	2020	0.76	0.28	–	22	–	–	–	–
Cantat-Gaudin & Anders	2020	0.76	–	–	–	–	–	–	–
Soubiran et al.	2018	0.76	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.76	–	–	–	–	–	–	–
Loktin & Popova	2017	0.96	0.40	–	70	–	–	–	–
Kharchenko et al.	2016	1.55	0.69	–	452	–	–	–	–
Kharchenko et al.	2013	1.55	0.69	–	452	–	–	–	–
Gozha et al.	2012	0.95	–	–	66	–	589	–	–
Piskunov et al.	2008	0.95	0.40	–	676	–	–	–	–
van den Bergh	2006	0.95	0.40	–	66	–	–	–	–
Kharchenko et al.	2005	0.95	0.40	–	676	–	–	–	–
Kharchenko et al.	2003	0.95	0.40	–	–	–	–	–	–
Dias et al.	2002	0.95	0.41	–	66	–	–	–	–

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

Visualization

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