Collinder 440

(NGC 7128; MWSC 3554; OCL 218; FSR 0327)

0.97 UTI

0.83

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 325

Stellar density (N₅₀/rad) 95.2 [N/pc²]

C3 classification AA

C_N 0.83 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 440 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.

Distant High extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 440 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–	325.992	53.715	0.268	-4.065	-4.131	-53.53
Almeida et al.	2025	325.991	53.714	–	–	–	–
Zhang et al.	2024	325.989	53.716	–	–	–	–
Hunt & Reffert	2024	325.989	53.716	0.277	-4.054	-4.131	-53.532
Celli et al.	2024	325.991	53.715	–	–	–	–
Cavallo et al.	2024	325.996	53.714	0.269	–	–	–
Hunt & Reffert	2023	325.989	53.716	0.277	-4.054	-4.131	-53.532
Almeida et al.	2023	325.991	53.712	–	–	–	–
Just et al.	2023	325.955	53.722	–	–	–	–
Jaehnig et al.	2021	325.99	53.717	0.285	-4.028	-4.1	–
Rain et al.	2021	325.991	53.715	0.261	-4.026	-4.111	–
Dias et al.	2021	325.991	53.714	0.255	-4.015	-4.124	–
Cantat-Gaudin et al.	2020	325.991	53.715	0.261	-4.026	-4.111	–
Sánchez et al.	2020	325.988	53.715	–	-3.925	-4.245	–
Cantat-Gaudin & Anders	2020	325.991	53.715	0.261	-4.026	-4.111	–
Dias et al.	2019	325.992	53.715	0.261	-4.026	-4.111	-54.93
Bica et al.	2019	325.995	53.706	–	–	–	–
Cantat-Gaudin et al.	2018	325.991	53.715	0.261	-4.026	-4.111	–
Loktin & Popova	2017	325.995	53.715	–	-5.17	-4.84	-48.2
Kharchenko et al.	2016	325.955	53.722	–	–	–	–
Dias et al.	2014	325.987	53.715	–	-5.17	-4.84	–
Kharchenko et al.	2013	325.96	53.725	–	-6.9	-2.76	-48.2
Gozha et al.	2012	325.987	53.715	–	–	–	–
Kharchenko et al.	2012	325.96	53.725	–	-6.9	-2.76	-48.25
Kharchenko et al.	2007	325.99	53.72	–	0.03	–	–
van den Bergh	2006	326.0	53.717	–	–	–	–
Dias et al.	2002	325.988	53.715	–	-5.17	-4.84	-48.0
Dambis	1999	325.987	53.715	–	–	–	–

💡 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–	3.19	3.14	2.21	18	-0.032	1236	0.6	0.0
Almeida et al.	2025	3.24	2.88	–	13	–	1053	–	–
Zhang et al.	2024	–	–	–	–	-0.320⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	2643⁽¹⁾	–	–
Celli et al.	2024	–	–	–	26	–	1236	–	–
Cavallo et al.	2024	3.19	3.13	–	16	0.220	–	–	–
Hunt & Reffert	2023	3.33	3.19	2.21	18	–	–	–	–
Almeida et al.	2023	3.13	2.94	–	15	-0.046	1366⁽¹⁾	0.60	–
Just et al.	2023	–	–	–	18	–	65	–	–
Jaehnig et al.	2021	3.48⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.45	3.13	–	18	–	–	–	0
Dias et al.	2021	3.24	2.88	–	13	-0.032	–	–	–
Cantat-Gaudin et al.	2020	4.21	2.59	–	26	–	–	–	–
Cantat-Gaudin & Anders	2020	3.45	–	–	–	–	–	–	–
Dias et al.	2019	4.82	2.85	–	14	0.223	–	–	–
Cantat-Gaudin et al.	2018	3.45	–	–	–	–	–	–	–
Loktin & Popova	2017	2.31	3.14	–	19	–	–	–	–
Kharchenko et al.	2016	2.30	3.41	–	18	–	–	–	–
Kharchenko et al.	2013	2.30	3.41	–	18	–	–	–	–
Gozha et al.	2012	2.31	–	–	18	–	–	–	–
Kharchenko et al.	2012	2.30	3.41	–	18	–	–	–	–
van den Bergh	2006	2.31	3.16	–	18	–	–	–	–
Dias et al.	2002	2.31	3.16	–	18	–	–	–	–
Dambis	1999	2.01	5.08	–	25	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0157	16.9	325.99	53.72	0.28	-4.07	-4.16	-50.94	0.0

💡 Note: The % column shows the percentage of members that Collinder 440 shares with each listed object.

Visualization

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