UBC 428

0.58 UTI

0.68

C_N

0.47

C_dens

0.75

C_C3

0.5

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 86

Radius (P>50% members) 6.7 [arcmin]

C_N 0.68 Moderately populated
C_dens 0.47 Loose
C_C3 0.75 High quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UBC 428 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a 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.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 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	–	66.777	44.688	0.322	1.279	-1.395	3.969
Almeida et al.	2025	66.802	44.685	–	–	–	–
Zhang et al.	2024	66.779	44.708	–	–	–	–
Hunt & Reffert	2024	66.779	44.708	0.34	1.267	-1.401	-22.579
Cavallo et al.	2024	66.767	44.687	0.342	–	–	–
Hunt & Reffert	2023	66.779	44.708	0.34	1.267	-1.401	-22.579
Dias et al.	2021	66.802	44.685	0.276	1.278	-1.38	-15.185
Cantat-Gaudin et al.	2020	66.793	44.67	0.269	1.303	-1.37	–
Castro-Ginard et al.	2020	66.771	44.665	0.274	1.287	-1.374	–

💡 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]	Bfr	BSS
Almeida et al.	2025	2.84	2.66	–	11	–	843	–	–
Zhang et al.	2024	–	–	–	–	-0.329*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	721*	–	–
Cavallo et al.	2024	2.65	2.42	–	437	0.080	–	–	–
Hunt & Reffert	2023	2.77	2.07	1.08	435	–	–	–	–
Dias et al.	2021	2.84	2.66	–	11	-0.176	–	–	–
Cantat-Gaudin et al.	2020	3.44	1.94	–	240	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 4659	67.4	66.77	44.7	0.35	1.25	-1.41	4.69	0.06

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

Visualization

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