UBC 1331

0.29 UTI

0.57

C_N

0.39

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 64

Core radius and density 1.9 [pc], 1.9 [pc^-2]

C3 classification CB

C_N 0.57 Moderately populated
C_dens 0.39 Loose
C_C3 0.38 Low 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

ℹ️

UBC 1331 is a moderately populated, loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

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

Distant Moderate extinction Metal-poor Intermediate age

Palma et al. (2025)
Classified as optical pair P592, along with UBC_1333.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Data

🔍 Search references for UBC 1331 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	102.101	4.013	0.256	-0.531	-0.81	63.753
Hunt & Reffert	2024	102.107	4.007	0.251	-0.534	-0.815	51.845
Cavallo et al.	2024	102.098	4.013	0.246	–	–	–
Hunt & Reffert	2023	102.107	4.007	0.251	-0.534	-0.815	51.845
Castro-Ginard et al.	2022	102.1	4.02	0.26	-0.55	-0.79	52.41

💡 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–	3.38	1.63	1.89	480	-0.830	580	–	–
Hunt & Reffert	2024	3.38	1.63	1.89	480	–	580⁽¹⁾	–	–
Cavallo et al.	2024	2.70	2.18	–	479	-0.830	–	–	–
Hunt & Reffert	2023	3.38	1.63	1.89	480	–	–	–	–
Castro-Ginard et al.	2022	4.43	1.18	–	332	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 2050	10.9	102.07	4.02	0.26	-0.5	-0.57	63.75	0.04

💡 Note: The % column shows the percentage of members that UBC 1331 shares with each listed object.

Visualization

ℹ️

1 2