Collinder 428

0.57 UTI

0.48

C_N

0.64

C_dens

0.75

C_C3

0.5

C_lit

1.0

C_dup

N₅₀ (P>50% members) 48

Stellar density (N₅₀/rad) 3.2 [N/pc²]

C3 classification AB

C_N 0.48 Poorly populated
C_dens 0.64 Moderately dense
C_C3 0.75 High quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Collinder 428 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a very large^* 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 metallicity parameters (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~10.25 kpc) differs significantly from the median photometric distance (~3.39 kpc).

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

Distant Moderate extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 428 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–	315.741	44.503	0.098	-2.911	-3.039	-86.071
Hu & Soubiran	2025	315.745	44.495	–	–	–	–
Zhang et al.	2024	315.742	44.5	–	–	–	–
Hunt & Reffert	2024	315.742	44.5	0.088	-2.889	-3.063	-72.031
Cavallo et al.	2024	315.744	44.495	0.097	–	–	–
Hunt & Reffert	2023	315.742	44.5	0.088	-2.889	-3.063	-72.031
Loktin & Popova	2017	315.795	44.583	–	-1.213	-0.257	–
Dias et al.	2014	315.8	44.583	–	-3.13	-1.47	–
Kharchenko et al.	2003	315.76	44.58	–	-0.5	-0.55	–
Dias et al.	2002	315.8	44.583	–	-3.13	-1.47	–

💡 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–	3.39	1.4	1.57	603	0.002	1156	–	–
Hu & Soubiran	2025	–	–	–	–	-0.230⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	0.002⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	1156⁽¹⁾	–	–
Cavallo et al.	2024	4.59	1.83	–	794	0.390	–	–	–
Hunt & Reffert	2023	7.68	2.90	1.57	158	–	–	–	–
Loktin & Popova	2017	3.39	1.40	–	603	–	–	–	–
Kharchenko et al.	2003	1.00	0.31	–	–	–	–	–	–
Dias et al.	2002	1.00	0.31	–	–	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3030	89.6	315.74	44.5	0.11	-2.9	-3.04	-72.05	0.19

💡 Note: The % column shows the percentage of members that Collinder 428 shares with each listed object.

Visualization

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