UBC 46

0.26 UTI

0.0

C_N

0.07

C_dens

0.62

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 19

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification AC

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.3 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 46 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a small percentage of members with 3 later reported entries. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Massive Near-solar metallicity Young

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

Data

🔍 Search references for UBC 46 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–	33.693	57.313	0.403	-0.832	-1.155	13.372
Almeida et al.	2025	33.743	57.31	–	–	–	–
Dias et al.	2021	33.743	57.31	0.374	-0.805	-1.092	–
Cantat-Gaudin et al.	2020	33.672	57.318	0.401	-0.824	-1.151	–
Cantat-Gaudin & Anders	2020	33.672	57.318	0.401	-0.824	-1.151	–
Castro-Ginard et al.	2019	33.693	57.309	0.397	-0.818	-1.144	–

💡 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–	2.16	1.76	–	41	-0.143	1103	–	–
Almeida et al.	2025	2.00	1.76	–	41	–	1103	–	–
Dias et al.	2021	2.00	1.76	–	41	-0.143	–	–	–
Cantat-Gaudin et al.	2020	2.63	1.35	–	112	–	–	–	–
Cantat-Gaudin & Anders	2020	2.32	–	–	–	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 3744	12.0	33.13	57.56	0.38	-0.8	-1.07	13.37	0.12
CWWDL 13364	4.0	34.05	57.8	0.43	-0.84	-1.05	317.01	0.14
CWWDL 4607	4.0	33.96	57.71	0.41	-0.82	-1.04	317.01	0.17

💡 Note: The % column shows the percentage of members that UBC 46 shares with each listed object.

Visualization

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