UBC 1525

0.42 UTI

0.52

C_N

0.41

C_dens

1.0

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 54

Core radius and density 1.6 [pc], 2.0 [pc^-2]

C3 classification AA

C_N 0.52 Moderately populated
C_dens 0.41 Loose
C_C3 1.0 Very high quality
C_lit 0.1 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 1525 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a moderate distance, near 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 parameter (see Parameters). It is rarely 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

Liu et al. (2025)
Classified as primordial binary cluster 365 along with Theia_2819.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P68, along with Theia_2819.

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 1525 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–	216.46	-61.905	0.445	-4.096	-2.72	-47.571
Hunt & Reffert	2024	216.456	-61.889	0.445	-4.113	-2.722	-47.559
Cavallo et al.	2024	216.485	-61.903	0.448	–	–	–
Hunt & Reffert	2023	216.456	-61.889	0.445	-4.113	-2.722	-47.559
Castro-Ginard et al.	2022	216.45	-61.9	0.45	-4.09	-2.7	–

💡 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–	2.05	1.28	0.73	117	-0.030	279	–	–
Liu et al.	2025	4.07	0.53	–	41	–	–	–	–
Hunt & Reffert	2024	2.05	1.28	0.73	117	–	279⁽¹⁾	–	–
Cavallo et al.	2024	1.93	1.49	–	275	-0.030	–	–	–
Hunt & Reffert	2023	2.05	1.28	0.73	117	–	–	–	–
Castro-Ginard et al.	2022	2.36	1.23	–	62	–	–	–	–

(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 13433	63.0	216.44	-61.91	0.44	-4.08	-2.72	-47.57	0.03

💡 Note: The % column shows the percentage of members that UBC 1525 shares with each listed object.

Visualization

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