Collinder 209

(VDBH 71; NGC 2910; MWSC 1679; OCL 781; vdBergh-Hagen 71; ESO 166 17; FSR 1493; FoF 987)

0.92 UTI

0.86

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 404

Stellar density (N₅₀/rad) 97.2 [N/pc²]

C3 classification AB

C_N 0.86 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 209 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 age 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. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 209 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–	142.633	-52.91	0.77	-6.76	6.155	7.059
Li et al.	2025	142.643	-52.913	0.746	-6.802	6.159	–
Wei et al.	2025	142.649	-52.907	0.771	-6.757	6.134	–
Almeida et al.	2025	142.636	-52.917	–	–	–	–
Hunt & Reffert	2024	142.64	-52.909	0.779	-6.763	6.149	8.04
Cavallo et al.	2024	142.636	-52.912	0.776	–	–	–
Hunt & Reffert	2023	142.64	-52.909	0.779	-6.763	6.149	8.04
Almeida et al.	2023	142.634	-52.921	–	–	–	–
Cordoni et al.	2023	142.636	-52.917	0.748	-6.771	6.177	–
Just et al.	2023	142.614	-52.922	–	–	–	–
Tarricq et al.	2022	142.641	-52.922	0.768	-6.755	6.138	–
Jaehnig et al.	2021	142.641	-52.904	0.779	-6.78	6.123	–
Rain et al.	2021	142.643	-52.913	0.746	-6.802	6.159	–
Dias et al.	2021	142.636	-52.917	0.748	-6.771	6.177	–
Cantat-Gaudin et al.	2020	142.643	-52.913	0.746	-6.802	6.159	–
Cantat-Gaudin & Anders	2020	142.643	-52.913	0.746	-6.802	6.159	–
Liu & Pang	2019	142.633	-52.911	0.737	-6.771	6.123	–
Bossini et al.	2019	142.643	-52.913	–	–	–	–
Bica et al.	2019	142.614	-52.89	–	–	–	–
Cantat-Gaudin et al.	2018	142.643	-52.913	0.746	-6.802	6.159	–
Loktin & Popova	2017	142.62	-52.918	–	-8.413	4.0	–
Kharchenko et al.	2016	142.614	-52.922	–	–	–	–
Dias et al.	2014	142.625	-52.918	–	-3.56	3.11	–
Kharchenko et al.	2013	142.62	-52.925	–	-9.3	4.82	–
Gozha et al.	2012	142.625	-52.918	–	–	–	–
Piskunov et al.	2008	142.615	-52.918	–	–	–	–
van den Bergh	2006	142.625	-52.917	–	–	–	–
Kharchenko et al.	2005	142.62	-52.92	–	-8.96	4.62	–
Kharchenko et al.	2003	142.6	-52.92	–	-8.12	4.61	–
Dias et al.	2002	142.625	-52.918	–	-3.56	3.11	–

💡 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–	1.3	0.86	1.02	110	0.000	490	0.41	0.0
Li et al.	2025	1.22	0.64	–	154	0.140	–	–	–
Wei et al.	2025	1.32	0.75	–	87	0.000	841	0.39	–
Almeida et al.	2025	1.23	0.76	–	153	–	421	–	–
Hunt & Reffert	2024	–	–	–	–	–	932⁽¹⁾	–	–
Cavallo et al.	2024	1.31	0.99	–	83	-0.020	–	–	–
Hunt & Reffert	2023	1.22	0.57	1.02	116	–	–	–	–
Almeida et al.	2023	1.22	0.79	–	104	0.051	419⁽¹⁾	0.41	–
Cordoni et al.	2023	1.23	0.76	–	153	0.146	3580	0.43	0.00
Just et al.	2023	–	–	–	16	–	195	–	–
Tarricq et al.	2022	1.23	–	–	135	–	–	–	–
Jaehnig et al.	2021	1.29⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.29	0.84	–	47	–	–	–	0
Dias et al.	2021	1.23	0.76	–	153	0.146	–	–	–
Cantat-Gaudin et al.	2020	1.26	0.57	–	129	–	–	–	–
Cantat-Gaudin & Anders	2020	1.29	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	44	-0.250	–	–	–
Bossini et al.	2019	1.43	0.86	–	48	0.000	–	–	–
Cantat-Gaudin et al.	2018	1.29	–	–	–	–	–	–	–
Loktin & Popova	2017	2.56	1.06	–	160	–	–	–	–
Kharchenko et al.	2016	1.88	1.23	–	16	–	–	–	–
Kharchenko et al.	2013	1.88	1.23	–	16	–	–	–	–
Gozha et al.	2012	2.61	–	–	160	-0.040	490	–	–
Piskunov et al.	2008	2.61	1.05	–	29	–	–	–	–
van den Bergh	2006	2.61	1.05	–	158	–	–	–	–
Kharchenko et al.	2005	2.61	1.05	–	29	–	–	–	–
Kharchenko et al.	2003	2.61	1.08	–	–	–	–	–	–
Dias et al.	2002	2.61	1.04	–	160	–	–	–	–

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

Visualization

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