Collinder 320

(VDBH 206; NGC 6250; OCL 991; vdBergh-Hagen 206; ESO 277 20; MWSC 2500; FoF 2225)

0.90 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 139

Stellar density (N₅₀/rad) 57.0 [N/pc²]

C3 classification AB

C_N 0.76 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 320 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Close Moderate extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 320 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–	254.503	-45.95	1.006	0.402	-2.391	-19.186
Li et al.	2025	254.497	-45.951	0.988	0.454	-2.379	–
Wei et al.	2025	254.496	-45.95	1.021	0.391	-2.432	–
Almeida et al.	2025	254.506	-45.948	–	–	–	–
Hunt & Reffert	2024	254.478	-45.949	1.016	0.38	-2.46	-18.11
Celli et al.	2024	254.497	-45.951	–	–	–	–
Cavallo et al.	2024	254.394	-46.008	1.016	–	–	–
Hunt & Reffert	2023	254.478	-45.949	1.016	0.38	-2.46	-18.11
He et al.	2022	254.478	-45.948	1.007	0.374	-2.402	–
Jaehnig et al.	2021	254.505	-45.957	1.021	0.432	-2.374	–
Rain et al.	2021	254.497	-45.951	0.988	0.454	-2.379	–
Dias et al.	2021	254.506	-45.948	0.977	0.438	-2.376	–
Cantat-Gaudin et al.	2020	254.497	-45.951	0.988	0.454	-2.379	–
Cantat-Gaudin & Anders	2020	254.497	-45.951	0.988	0.454	-2.379	–
Liu & Pang	2019	254.47	-45.954	0.962	0.319	-2.383	–
Bica et al.	2019	254.478	-45.925	–	–	–	–
Cantat-Gaudin et al.	2018	254.497	-45.951	0.988	0.454	-2.379	–
Loktin & Popova	2017	254.49	-45.938	–	-2.854	-6.631	-8.0
Dias et al.	2014	254.483	-45.937	–	-1.55	-2.35	–
Gozha et al.	2012	254.483	-45.937	–	–	–	–
Piskunov et al.	2008	254.481	-45.939	–	–	–	–
van den Bergh	2006	254.492	-45.943	–	–	–	–
Kharchenko et al.	2005	254.49	-45.94	–	1.8	-2.8	–
Kharchenko et al.	2003	254.47	-45.94	–	2.51	-2.52	–
Dias et al.	2002	254.483	-45.937	–	-1.55	-2.35	-8.04
Dambis	1999	254.492	-45.943	–	–	–	–

💡 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–	0.92	1.115	1.56	24	0.110	335	0.42	0.0
Li et al.	2025	0.81	1.20	–	19	-0.345	–	–	–
Wei et al.	2025	1.61	1.43	–	23	0.250	273	0.42	–
Almeida et al.	2025	0.95	1.34	–	19	–	335	–	–
Hunt & Reffert	2024	–	–	–	–	–	523⁽¹⁾	–	–
Celli et al.	2024	–	–	–	24	–	294	–	–
Cavallo et al.	2024	0.93	1.10	–	19	0.110	–	–	–
Hunt & Reffert	2023	0.92	1.13	1.56	15	–	–	–	–
He et al.	2022	–	1.45	–	16	–	–	–	–
Jaehnig et al.	2021	0.98⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	0.98	1.08	–	26	–	–	–	0
Dias et al.	2021	0.95	1.34	–	19	-0.008	–	–	–
Cantat-Gaudin et al.	2020	1.00	1.18	–	24	–	–	–	–
Cantat-Gaudin & Anders	2020	0.98	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	19	0.250	–	–	–
Cantat-Gaudin et al.	2018	0.98	–	–	–	–	–	–	–
Loktin & Popova	2017	0.87	1.08	–	26	–	–	–	–
Gozha et al.	2012	0.86	–	–	26	–	794	–	–
Piskunov et al.	2008	0.86	1.08	–	26	–	–	–	–
van den Bergh	2006	0.86	1.08	–	26	–	–	–	–
Kharchenko et al.	2005	0.86	1.08	–	26	–	–	–	–
Kharchenko et al.	2003	0.86	1.08	–	–	–	–	–	–
Dias et al.	2002	0.86	1.08	–	26	–	–	–	–
Dambis	1999	0.89	1.21	–	20	–	–	–	–

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

Visualization

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