Collinder 207

(VDBH 61; NGC 2849; MWSC 1648; OCL 756; vdBergh-Hagen 61; ESO 314 13; FSR 1439)

0.97 UTI

0.87

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 432

Stellar density (N₅₀/rad) 28.3 [N/pc²]

C3 classification AA

C_N 0.87 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 207 is a rich, very dense object of very high C3 quality. Its parallax locates it at a large distance, well above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Very distant Moderate extinction Massive Near-solar metallicity Old Contains BSS

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 207 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–	139.851	-40.519	0.164	-4.257	3.543	76.628
Li et al.	2025	139.85	-40.52	0.142	-4.272	3.519	–
Hu & Soubiran	2025	139.853	-40.52	–	–	–	–
Almeida et al.	2025	139.852	-40.521	–	–	–	–
Hunt & Reffert	2024	139.849	-40.519	0.158	-4.265	3.549	74.938
Cavallo et al.	2024	139.853	-40.52	0.159	–	–	–
Hunt & Reffert	2023	139.849	-40.519	0.158	-4.265	3.549	74.938
Just et al.	2023	139.841	-40.514	–	–	–	–
Jaehnig et al.	2021	139.847	-40.52	0.172	-4.264	3.51	–
Rain et al.	2021	139.85	-40.52	0.142	-4.272	3.519	–
Dias et al.	2021	139.852	-40.521	0.15	-4.285	3.506	–
Cantat-Gaudin et al.	2020	139.85	-40.52	0.142	-4.272	3.519	–
Cantat-Gaudin & Anders	2020	139.85	-40.52	0.142	-4.272	3.519	–
Bica et al.	2019	139.844	-40.518	–	–	–	–
Cantat-Gaudin et al.	2018	139.85	-40.52	0.142	-4.272	3.519	–
Kharchenko et al.	2016	139.841	-40.514	–	–	–	–
Dias et al.	2014	139.846	-40.523	–	-5.61	6.93	–
Kharchenko et al.	2013	139.846	-40.517	–	-8.42	9.32	–
Dias et al.	2002	139.846	-40.523	–	-5.61	6.93	–

💡 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–	5.22	1.115	1.21	1245	-0.189	1268	–	2.0
Li et al.	2025	5.11	1.41	–	1076	-0.242	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.200⁽⁵⁾	–	–	–
Almeida et al.	2025	4.77	1.37	–	1253	–	1268	–	–
Hunt & Reffert	2024	–	–	–	–	–	2653⁽¹⁾	–	–
Cavallo et al.	2024	3.98	1.24	–	1380	-0.120	–	–	–
Hunt & Reffert	2023	5.92	1.24	1.21	710	–	–	–	–
Just et al.	2023	–	–	–	1245	–	197	–	–
Jaehnig et al.	2021	6.02⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	5.85	0.99	–	1000	–	–	–	2
Dias et al.	2021	4.77	1.37	–	1253	-0.177	–	–	–
Cantat-Gaudin et al.	2020	5.22	0.85	–	1047	–	–	–	–
Cantat-Gaudin & Anders	2020	5.85	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	5.85	–	–	–	–	–	–	–
Kharchenko et al.	2016	4.80	0.90	–	1245	–	–	–	–
Kharchenko et al.	2013	4.80	0.90	–	1245	–	–	–	–
Dias et al.	2002	6.17	0.99	–	1000	–	–	–	–

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

Visualization

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