Collinder 265

(VDBH 142; NGC 4815; MWSC 2075; OCL 893; vdBergh-Hagen 142; ESO 096 01; FSR 1637)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 859

Stellar density (N₅₀/rad) 109.9 [N/pc²]

C3 classification AA

C_N 1.0 Very 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 265 is a very 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 massive, near-solar metallicity, intermediate-age 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.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age Contains BSS

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 265 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–	194.504	-64.959	0.281	-5.8	-0.944	-29.108
Li et al.	2025	194.499	-64.96	0.261	-5.754	-0.964	–
Hu & Soubiran	2025	194.495	-64.96	–	–	–	–
Almeida et al.	2025	194.493	-64.961	–	–	–	–
Hunt & Reffert	2024	194.507	-64.959	0.286	-5.81	-0.934	-25.986
Cavallo et al.	2024	194.495	-64.96	0.286	–	–	–
Hunt & Reffert	2023	194.507	-64.959	0.286	-5.81	-0.934	-25.986
Just et al.	2023	194.494	-64.957	–	–	–	–
Jaehnig et al.	2021	194.504	-64.962	0.29	-5.774	-0.952	–
Rain et al.	2021	194.499	-64.96	0.261	-5.754	-0.964	–
Dias et al.	2021	194.493	-64.961	0.266	-5.743	-0.952	-27.114
Cantat-Gaudin et al.	2020	194.499	-64.96	0.261	-5.754	-0.964	–
Cantat-Gaudin & Anders	2020	194.499	-64.96	0.261	-5.754	-0.964	–
Soubiran et al.	2018	194.499	-64.96	–	–	–	-29.81
Bica et al.	2019	194.484	-64.953	–	–	–	–
Cantat-Gaudin et al.	2018	194.499	-64.96	0.261	-5.754	-0.964	–
Loktin & Popova	2017	194.49	-64.96	–	-7.87	-2.999	–
Kharchenko et al.	2016	194.494	-64.957	–	–	–	–
Dias et al.	2014	194.496	-64.96	–	-2.68	-2.48	–
Kharchenko et al.	2013	194.505	-64.96	–	-11.04	0.43	–
Gozha et al.	2012	194.496	-64.96	–	–	–	–
van den Bergh	2006	194.5	-64.95	–	–	–	–
Dias et al.	2002	194.496	-64.96	–	-2.7	-2.41	–

💡 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–	3.08	2.5	1.87	385	0.020	4456	–	1.0
Li et al.	2025	2.86	2.23	–	659	0.050	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Almeida et al.	2025	2.67	2.35	–	442	–	4456	–	–
Hunt & Reffert	2024	–	–	–	–	–	9456⁽¹⁾	–	–
Cavallo et al.	2024	2.69	2.53	–	575	0.050	–	–	–
Hunt & Reffert	2023	3.14	2.55	1.87	258	–	–	–	–
Just et al.	2023	–	–	–	398	–	465	–	–
Jaehnig et al.	2021	3.48⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.45	2.48	–	229	–	–	–	1
Dias et al.	2021	2.67	2.35	–	442	0.060	–	–	–
Cantat-Gaudin et al.	2020	3.30	1.75	–	372	–	–	–	–
Cantat-Gaudin & Anders	2020	3.45	–	–	–	–	–	–	–
Soubiran et al.	2018	3.45	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.45	–	–	–	–	–	–	–
Loktin & Popova	2017	3.05	2.50	–	234	–	–	–	–
Kharchenko et al.	2016	2.99	2.61	–	398	–	–	–	–
Kharchenko et al.	2013	2.99	2.61	–	398	–	–	–	–
Gozha et al.	2012	3.08	–	–	234	-0.190	–	–	–
van den Bergh	2006	3.08	2.51	–	234	–	–	–	–
Dias et al.	2002	3.08	2.50	–	234	-0.010	–	–	–

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

Visualization

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