Collinder 1

(NGC 103; MWSC 40; OCL 291; FSR 0491)

0.97 UTI

0.84

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 343

Stellar density (N₅₀/rad) 36.2 [N/pc²]

C3 classification AA

C_N 0.84 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 1 is a 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 age and mass parameters (see Parameters). It is very well-studied in the literature.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 1 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–	6.309	61.327	0.283	-2.81	-1.059	-77.089
Li et al.	2025	6.312	61.326	0.288	-2.823	-0.988	–
Almeida et al.	2025	6.321	61.327	–	–	–	–
Hunt & Reffert	2024	6.311	61.326	0.286	-2.815	-1.066	-75.123
Cavallo et al.	2024	6.336	61.325	0.284	–	–	–
Hunt & Reffert	2023	6.311	61.326	0.286	-2.815	-1.066	-75.123
Almeida et al.	2023	6.319	61.325	–	–	–	–
Just et al.	2023	6.26	61.337	–	–	–	–
Jaehnig et al.	2021	6.312	61.325	0.325	-2.827	-1.001	–
Rain et al.	2021	6.312	61.326	0.288	-2.823	-0.988	–
Dias et al.	2021	6.321	61.327	0.289	-2.829	-0.978	-78.897
Cantat-Gaudin et al.	2020	6.312	61.326	0.288	-2.823	-0.988	–
Sánchez et al.	2020	6.317	61.323	–	-3.162	-1.027	–
Cantat-Gaudin & Anders	2020	6.312	61.326	0.288	-2.823	-0.988	–
Soubiran et al.	2018	6.312	61.326	–	–	–	-78.11
Bica et al.	2019	6.324	61.323	–	–	–	–
Cantat-Gaudin et al.	2018	6.312	61.326	0.288	-2.823	-0.988	–
Loktin & Popova	2017	6.315	61.323	–	-1.195	-2.138	-116.7
Kharchenko et al.	2016	6.26	61.337	–	–	–	–
Dias et al.	2014	6.317	61.323	–	-3.44	-0.32	–
Kharchenko et al.	2013	6.27	61.34	–	-2.49	-3.62	-116.7
Gozha et al.	2012	6.317	61.323	–	–	–	–
Kharchenko et al.	2012	6.27	61.34	–	-2.49	-3.62	-116.7
Kharchenko et al.	2007	6.31	61.32	–	0.03	–	–
van den Bergh	2006	6.325	61.35	–	–	–	–
Dias et al.	2002	6.317	61.323	–	-3.44	-0.32	-116.7
Dambis	1999	6.325	61.35	–	–	–	–

💡 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–	3.03	1.4	1.37	134	-0.123	1036	0.58	0.0
Li et al.	2025	3.25	1.59	–	112	0.056	–	–	–
Almeida et al.	2025	2.90	1.69	–	107	–	1231	–	–
Hunt & Reffert	2024	–	–	–	–	–	2266⁽¹⁾	–	–
Cavallo et al.	2024	2.83	1.51	–	282	0.070	–	–	–
Hunt & Reffert	2023	3.09	1.41	1.37	195	–	–	–	–
Almeida et al.	2023	2.98	1.72	–	99	-0.123	841⁽¹⁾	0.58	–
Just et al.	2023	–	–	–	367	–	34	–	–
Jaehnig et al.	2021	3.11⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.16	1.24	–	132	–	–	–	0
Dias et al.	2021	2.90	1.69	–	107	-0.138	–	–	–
Cantat-Gaudin et al.	2020	3.16	1.08	–	102	–	–	–	–
Cantat-Gaudin & Anders	2020	3.16	–	–	–	–	–	–	–
Soubiran et al.	2018	3.16	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.16	–	–	–	–	–	–	–
Loktin & Popova	2017	3.00	1.24	–	134	–	–	–	–
Kharchenko et al.	2016	2.50	1.40	–	367	–	–	–	–
Kharchenko et al.	2013	2.50	1.40	–	367	–	–	–	–
Gozha et al.	2012	3.03	–	–	134	-0.850	–	–	–
Kharchenko et al.	2012	2.50	1.40	–	367	–	–	–	–
van den Bergh	2006	3.03	1.27	–	135	–	–	–	–
Dias et al.	2002	3.03	1.26	–	134	–	–	–	–
Dambis	1999	2.75	1.71	–	28	–	–	–	–

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

Visualization

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