UBC 331

0.05 UTI

0.82

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

0.1

C_dup

C3 classification AA

Number of members (P>50%) 279

Radius (P>50% members) 12.4 [arcmin]

C_N 0.82 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.1 Likely duplicate

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

Overview

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UBC 331 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Low extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for UBC 331 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	–	266.01	-32.339	0.924	-1.961	-2.354	-23.096
Wei et al.	2025	265.982	-32.369	0.93	-1.968	-2.348	–
Castro-Ginard et al.	2020	265.995	-32.352	0.928	-1.959	-2.313	–

💡 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
Wei et al.	2025	1.09	0.88	–	676	-0.250	779	0.35	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Collinder 344	90.3	266.01	-32.34	0.92	-1.96	-2.35	-23.1	0.96

💡 Note: The % column shows the percentage of members that UBC 331 shares with each listed object.

Visualization

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