UBC 546

0.50 UTI

0.76

C_N

0.24

C_dens

1.0

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 132

Core radius and density 4.0 [pc], 1.2 [pc^-2]

C3 classification AA

C_N 0.76 Rich
C_dens 0.24 Very loose
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

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UBC 546 is a rich, very loose object of very high C3 quality. Its parallax locates it at a relatively close distance, below 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, metallicity, and mass parameters (see Parameters). It is poorly 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

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

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 546 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–	253.691	-48.453	0.509	-1.26	-2.701	-47.945
Li et al.	2025	253.687	-48.459	0.496	-1.276	-2.691	–
Almeida et al.	2025	253.667	-48.457	–	–	–	–
Hunt & Reffert	2024	253.707	-48.447	0.496	-1.238	-2.68	-49.752
Cavallo et al.	2024	253.658	-48.475	0.5	–	–	–
Hunt & Reffert	2023	253.707	-48.447	0.496	-1.238	-2.68	-49.752
Jadhav & Subramaniam	2021	253.687	-48.459	–	–	–	–
Dias et al.	2021	253.667	-48.457	0.483	-1.283	-2.694	-47.577
Cantat-Gaudin et al.	2020	253.687	-48.459	0.496	-1.276	-2.691	–
Castro-Ginard et al.	2020	253.671	-48.458	0.496	-1.292	-2.679	–

💡 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–	1.86	2.62	2.25	237	0.474	402	–	0
Li et al.	2025	1.58	2.98	–	31	-0.130	–	–	–
Almeida et al.	2025	1.94	2.54	–	237	–	402	–	–
Hunt & Reffert	2024	1.86	2.74	2.25	199	–	1333⁽¹⁾	–	–
Cavallo et al.	2024	1.72	2.62	–	363	0.560	–	–	–
Hunt & Reffert	2023	1.86	2.74	2.25	199	–	–	–	–
Jadhav & Subramaniam	2021	1.79	2.17	–	339	–	181	–	0⁽¹⁾
Dias et al.	2021	1.94	2.54	–	237	0.474	–	–	–
Cantat-Gaudin et al.	2020	1.79	2.17	–	339	–	–	–	–
Kounkel et al.	2020	2.75	3.82	–	6	–	–	–	–

(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 13344	64.4	253.7	-48.46	0.51	-1.23	-2.7	-47.94	0.01

💡 Note: The % column shows the percentage of members that UBC 546 shares with each listed object.

Visualization

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