UBC 326

0.62 UTI

0.67

C_N

0.9

C_dens

1.0

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 84

Core radius and density 1.3 [pc], 4.5 [pc^-2]

C3 classification AA

C_N 0.67 Moderately populated
C_dens 0.9 Very dense
C_C3 1.0 Very high quality
C_lit 0.26 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

UBC 326 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P154, along with HSC_2886.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Data

🔍 Search references for UBC 326 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	258.154	-36.056	0.597	-1.149	-2.805	-66.982
Li et al.	2025	258.155	-36.056	0.569	-1.113	-2.806	–
Almeida et al.	2025	258.165	-36.058	–	–	–	–
Hunt & Reffert	2024	258.143	-36.05	0.597	-1.136	-2.804	-57.721
Cavallo et al.	2024	258.153	-36.053	0.598	–	–	–
Hunt & Reffert	2023	258.143	-36.05	0.597	-1.136	-2.804	-57.721
Tarricq et al.	2022	258.177	-36.057	0.575	-1.104	-2.798	–
Dias et al.	2021	258.165	-36.058	0.572	-1.095	-2.783	-67.456
Cantat-Gaudin et al.	2020	258.155	-36.056	0.569	-1.113	-2.806	–
Castro-Ginard et al.	2020	258.16	-36.058	0.566	-1.123	-2.804	–

💡 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–	1.55	2.87	2.17	309	0.179	1030	–	–
Li et al.	2025	1.28	2.91	–	748	-0.050	–	–	–
Almeida et al.	2025	1.54	2.83	–	380	–	562	–	–
Hunt & Reffert	2024	1.56	3.05	2.17	222	–	1497⁽¹⁾	–	–
Cavallo et al.	2024	1.55	2.83	–	468	0.560	–	–	–
Hunt & Reffert	2023	1.56	3.05	2.17	222	–	–	–	–
Tarricq et al.	2022	1.49	–	–	309	–	–	–	–
Dias et al.	2021	1.54	2.83	–	380	0.179	–	–	–
Cantat-Gaudin et al.	2020	1.56	2.30	–	263	–	–	–	–
Kounkel et al.	2020	1.82	3.22	–	186	–	–	–	–

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

Visualization

ℹ️

1 2 3