UBC 525

0.50 UTI

0.55

C_N

0.2

C_dens

0.75

C_C3

0.5

C_lit

1.0

C_dup

N_m (P>50%) 59

Core radius and density 3.0 [pc], 1.0 [pc^-2]

C3 classification AB

C_N 0.55 Moderately populated
C_dens 0.2 Very loose
C_C3 0.75 High quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 525 is a moderately populated, very loose object of 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, very young cluster, but with a large variance across recent sources for the distance, absorption, and age parameters (see Parameters). It is moderately studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Very young

Li et al. (2026)
Tidal & Core radii: r_t=22+/-6.6 [pc], r_c=0.62+/-0.0 [pc]; stars within r_t: N~145

Liu et al. (2025)
Classified as primordial binary cluster 237 along with HSC_2562, and as tidal capture (resonant trapping binary) 363 along with Theia_2478, and of multiple system 68 along with Theia_2478 and HSC_2562.

Palma et al. (2025)
Part of multiple system G158, along with HSC_2549, HSC_2562 and Theia_2478.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.91 (50th percentile), true positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.91 (50th percentile), true positive? (human-assigned).

Data

🔍 Search references for UBC 525 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–	196.053	-63.944	0.432	-4.228	-1.204	–
Li et al.	2026	196.08	-63.91	–	–	–	–
Liu et al.	2025	196.14	-63.95	0.43	-4.24	-1.18	–
Li et al.	2025	196.023	-63.941	0.436	-4.202	-1.219	–
Hunt & Reffert	2024	196.144	-63.954	0.432	-4.239	-1.176	–
Celli et al.	2024	196.023	-63.941	–	–	–	–
Cavallo et al.	2024	196.09	-63.895	0.43	–	–	–
Hunt & Reffert	2023	196.144	-63.954	0.432	-4.239	-1.176	–
Cantat-Gaudin et al.	2020	196.023	-63.941	0.436	-4.202	-1.219	–
Castro-Ginard et al.	2020	196.051	-63.922	0.434	-4.206	-1.21	–

💡 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–	2.15	2.2	2.59	10	0.019	864	–	–
Liu et al.	2025	5.04	0.77	–	12	–	–	–	–
Li et al.	2025	0.99	0.57	–	1539	0.068	–	–	–
Hunt & Reffert	2024	2.15	2.20	2.59	9	–	1314⁽¹⁾	–	–
Celli et al.	2024	–	–	–	12	–	414	–	–
Cavallo et al.	2024	2.08	2.38	–	9	-0.030	–	–	–
Hunt & Reffert	2023	2.15	2.19	2.59	9	–	–	–	–
Cantat-Gaudin et al.	2020	2.28	2.26	–	12	–	–	–	–
Kounkel et al.	2020	2.62	2.57	–	3	–	–	–	–

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

Visualization

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