UBC 381

0.60 UTI

0.35

C_N

0.88

C_dens

0.75

C_C3

0.5

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 35

Radius (P>50% members) 4.3 [arcmin]

C_N 0.35 Poorly populated
C_dens 0.88 Dense
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 381 is a poorly populated, dense object of high C3 quality. Its parallax locates it at a moderate distance, above 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

Note: This object shares a large 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.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 381 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	–	316.265	48.718	0.445	-0.395	-2.226	-27.2
Almeida et al.	2025	316.239	48.735	–	–	–	–
Hunt & Reffert	2024	316.25	48.7	0.436	-0.424	-2.247	–
Cavallo et al.	2024	316.268	48.727	0.44	–	–	–
Hunt & Reffert	2023	316.25	48.7	0.436	-0.424	-2.247	–
Almeida et al.	2023	316.285	48.728	–	–	–	–
Dias et al.	2021	316.239	48.735	0.437	-0.395	-2.174	–
Cantat-Gaudin et al.	2020	316.25	48.726	0.44	-0.415	-2.19	–
Castro-Ginard et al.	2020	316.25	48.723	0.441	-0.408	-2.18	–

💡 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	2.15	1.68	–	170	–	172	–	–
Hunt & Reffert	2024	–	–	–	–	–	224*	–	–
Cavallo et al.	2024	2.29	1.91	–	93	0.460	–	–	–
Hunt & Reffert	2023	2.12	1.72	1.51	72	–	–	–	–
Almeida et al.	2023	2.04	1.90	–	101	0.059	190*	0.68	–
Dias et al.	2021	2.15	1.68	–	170	0.286	–	–	–
Cantat-Gaudin et al.	2020	2.17	1.32	–	331	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 13942	77.1	316.27	48.73	0.46	-0.4	-2.22	-27.2	0.01

💡 Note: The % column shows the percentage of members that UBC 381 shares with each listed object.

Visualization

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