Collinder 175

(VDBH 18; NGC 2533; MWSC 1432; OCL 695; vdBergh-Hagen 18; ESO 430 19; FSR 1338; FoF 387)

0.96 UTI

0.82

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 288

Stellar density (N₅₀/rad) 12.8 [N/pc²]

C3 classification AA

C_N 0.82 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 175 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above 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 absorption and age parameters (see Parameters). It is very well-studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 175 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–	121.766	-29.865	0.344	-3.179	5.066	36.69
Li et al.	2025	121.773	-29.872	0.329	-3.189	5.041	–
Hu & Soubiran	2025	121.766	-29.869	–	–	–	–
Almeida et al.	2025	121.769	-29.876	–	–	–	–
Hunt & Reffert	2024	121.769	-29.86	0.35	-3.185	5.074	40.576
Cavallo et al.	2024	121.766	-29.869	0.347	–	–	–
He et al.	2023	121.77	-29.892	0.161	-1.618	2.58	107.32
Hunt & Reffert	2023	121.769	-29.86	0.35	-3.185	5.074	40.576
Almeida et al.	2023	121.765	-29.869	–	–	–	–
Just et al.	2023	121.772	-29.877	–	–	–	–
Jaehnig et al.	2021	121.772	-29.869	0.352	-3.188	5.055	–
Rain et al.	2021	121.773	-29.872	0.329	-3.189	5.041	–
Dias et al.	2021	121.769	-29.876	0.334	-3.178	5.039	34.631
Cantat-Gaudin et al.	2020	121.773	-29.872	0.329	-3.189	5.041	–
Cantat-Gaudin & Anders	2020	121.773	-29.872	0.329	-3.189	5.041	–
Liu & Pang	2019	121.758	-29.869	0.322	-3.214	5.011	–
Soubiran et al.	2018	121.773	-29.872	–	–	–	35.21
Bica et al.	2019	121.757	-29.889	–	–	–	–
Cantat-Gaudin et al.	2018	121.773	-29.872	0.329	-3.189	5.041	–
Loktin & Popova	2017	121.77	-29.883	–	-0.76	2.38	35.2
Kharchenko et al.	2016	121.772	-29.877	–	–	–	–
Dias et al.	2014	121.767	-29.883	–	-1.62	2.02	–
Kharchenko et al.	2013	121.777	-29.88	–	-0.76	2.38	35.2
Gozha et al.	2012	121.767	-29.883	–	–	–	–
van den Bergh	2006	121.75	-29.9	–	–	–	–
Dias et al.	2002	121.767	-29.883	–	-1.62	2.02	35.22

💡 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–	2.8	1.0	1.1	729	-0.117	562	0.69	1.0
Li et al.	2025	2.55	0.96	–	1055	-0.132	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.150⁽⁵⁾	–	–	–
Almeida et al.	2025	2.61	1.31	–	743	–	464	–	–
Hunt & Reffert	2024	–	–	–	–	–	1388⁽¹⁾	–	–
Cavallo et al.	2024	2.50	1.34	–	562	-0.040	–	–	–
He et al.	2023	6.92	1.50	–	501	–	–	–	–
Hunt & Reffert	2023	2.56	0.83	1.10	729	–	–	–	–
Almeida et al.	2023	2.53	1.04	–	1002	-0.032	632⁽¹⁾	0.69	–
Just et al.	2023	–	–	–	232	–	493	–	–
Jaehnig et al.	2021	2.82⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.80	0.43	–	692	–	–	–	1
Dias et al.	2021	2.61	1.31	–	743	-0.103	–	–	–
Cantat-Gaudin et al.	2020	2.63	0.90	–	1047	–	–	–	–
Cantat-Gaudin & Anders	2020	2.80	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1230	-0.500	–	–	–
Soubiran et al.	2018	2.80	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.80	–	–	–	–	–	–	–
Loktin & Popova	2017	3.38	0.15	–	752	–	–	–	–
Kharchenko et al.	2016	2.96	1.42	–	232	–	–	–	–
Kharchenko et al.	2013	2.96	1.42	–	232	–	–	–	–
Gozha et al.	2012	1.70	–	–	692	–	–	–	–
van den Bergh	2006	3.38	0.16	–	759	–	–	–	–
Dias et al.	2002	1.70	0.43	–	692	–	–	–	–

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

Visualization

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