UBC 1328

0.24 UTI

0.37

C_N

0.22

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 37

Core radius and density 1.8 [pc], 1.1 [pc^-2]

C3 classification BB

C_N 0.37 Poorly populated
C_dens 0.22 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 1328 is a poorly populated, very loose object of intermediate 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 (see Parameters). It is rarely studied in the literature.

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UBC 1328 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–	97.05	6.83	0.389	-0.541	-1.147	40.713
Hunt & Reffert	2024	97.043	6.855	0.388	-0.537	-1.146	40.701
Cavallo et al.	2024	97.065	6.836	0.389	–	–	–
Hunt & Reffert	2023	97.043	6.855	0.388	-0.537	-1.146	40.701
Castro-Ginard et al.	2022	97.03	6.84	0.39	-0.54	-1.16	–

💡 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–	2.34	1.325	0.62	286	0.070	245	–	–
Hunt & Reffert	2024	2.34	1.32	0.62	286	–	245⁽¹⁾	–	–
Cavallo et al.	2024	2.30	1.43	–	398	0.070	–	–	–
Hunt & Reffert	2023	2.34	1.32	0.62	286	–	–	–	–
Castro-Ginard et al.	2022	2.84	1.33	–	190	–	–	–	–

(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 159	86.5	97.05	6.82	0.39	-0.54	-1.15	40.71	0.01

💡 Note: The % column shows the percentage of members that UBC 1328 shares with each listed object.

Visualization

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