Collinder 270

(NGC 5138; MWSC 2121; OCL 902; ESO 132 07; FoF 1995)

0.96 UTI

0.79

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 197

Stellar density (N₅₀/rad) 33.9 [N/pc²]

C3 classification AA

C_N 0.79 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 270 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is very well-studied in the literature.

Relatively close Low extinction Near-solar metallicity Young

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 270 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–	201.845	-59.023	0.519	-3.634	-1.409	-18.511
Li et al.	2025	201.829	-59.023	0.51	-3.597	-1.449	–
Almeida et al.	2025	201.841	-59.029	–	–	–	–
Hunt & Reffert	2024	201.834	-59.025	0.516	-3.643	-1.392	-24.378
Cavallo et al.	2024	201.823	-59.028	0.519	–	–	–
Hunt & Reffert	2023	201.834	-59.025	0.516	-3.643	-1.392	-24.378
Almeida et al.	2023	201.858	-59.021	–	–	–	–
Just et al.	2023	201.785	-59.027	–	–	–	–
Jaehnig et al.	2021	201.836	-59.022	0.542	-3.605	-1.456	–
Rain et al.	2021	201.829	-59.023	0.51	-3.597	-1.449	–
Dias et al.	2021	201.841	-59.029	0.518	-3.605	-1.438	–
Cantat-Gaudin et al.	2020	201.829	-59.023	0.51	-3.597	-1.449	–
Cantat-Gaudin & Anders	2020	201.829	-59.023	0.51	-3.597	-1.449	–
Liu & Pang	2019	201.827	-59.031	0.506	-3.583	-1.456	–
Bossini et al.	2019	201.829	-59.023	–	–	–	–
Bica et al.	2019	201.805	-59.032	–	–	–	–
Cantat-Gaudin et al.	2018	201.829	-59.023	0.51	-3.597	-1.449	–
Loktin & Popova	2017	201.78	-59.03	–	-7.305	-1.303	-9.6
Kharchenko et al.	2016	201.785	-59.027	–	–	–	–
Dias et al.	2014	201.817	-59.033	–	-7.98	-1.35	–
Kharchenko et al.	2013	201.795	-59.03	–	-2.63	0.64	-9.6
Gozha et al.	2012	201.817	-59.033	–	–	–	–
Piskunov et al.	2008	201.803	-59.022	–	–	–	–
van den Bergh	2006	201.8	-59.033	–	–	–	–
Kharchenko et al.	2005	201.81	-59.03	–	-3.95	0.7	–
Kharchenko et al.	2003	201.78	-59.04	–	-2.77	-0.73	–
Chen et al.	2003	201.822	-59.021	–	–	–	–
Dias et al.	2002	201.817	-59.033	–	-7.95	-1.52	-9.58
Dambis	1999	201.817	-59.033	–	–	–	–

💡 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–	1.86	0.81	1.57	63	0.120	448	0.42	0.0
Li et al.	2025	1.66	0.78	–	63	-0.151	–	–	–
Almeida et al.	2025	1.77	0.84	–	63	–	332	–	–
Hunt & Reffert	2024	–	–	–	–	–	829⁽¹⁾	–	–
Cavallo et al.	2024	1.64	0.58	–	245	0.220	–	–	–
Hunt & Reffert	2023	1.82	0.77	1.57	175	–	–	–	–
Almeida et al.	2023	1.84	0.84	–	105	0.125	448⁽¹⁾	0.42	–
Just et al.	2023	–	–	–	35	–	193	–	–
Jaehnig et al.	2021	1.84⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.86	0.74	–	43	–	–	–	0
Dias et al.	2021	1.77	0.84	–	63	0.091	–	–	–
Cantat-Gaudin et al.	2020	1.83	0.73	–	48	–	–	–	–
Cantat-Gaudin & Anders	2020	1.86	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	29	-0.250	–	–	–
Bossini et al.	2019	1.99	0.76	–	43	0.120	–	–	–
Cantat-Gaudin et al.	2018	1.86	–	–	–	–	–	–	–
Loktin & Popova	2017	1.99	0.79	–	104	–	–	–	–
Kharchenko et al.	2016	1.82	0.97	–	35	–	–	–	–
Kharchenko et al.	2013	1.82	0.97	–	35	0.120	–	–	–
Gozha et al.	2012	1.99	–	–	97	0.120	1905	–	–
Piskunov et al.	2008	1.99	0.81	–	35	–	–	–	–
van den Bergh	2006	1.99	0.81	–	98	–	–	–	–
Kharchenko et al.	2005	1.99	0.81	–	35	–	–	–	–
Kharchenko et al.	2003	1.99	0.81	–	–	–	–	–	–
Chen et al.	2003	1.99	0.81	–	90	0.120⁽¹⁾	–	–	–
Dias et al.	2002	1.99	0.81	–	97	0.120	–	–	–
Dambis	1999	1.57	0.82	–	40	–	–	–	–

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

Visualization

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