UBC 191

0.23 UTI

0.54

C_N

0.25

C_dens

0.75

C_C3

0.38

C_lit

0.51

C_dup

C3 classification AB

Number of members (P>50%) 57

Radius (P>50% members) 9.4 [arcmin]

C_N 0.54 Moderately populated
C_dens 0.25 Loose
C_C3 0.75 High quality
C_lit 0.38 Poorly studied
C_dup 0.51 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UBC 191 is a moderately populated, loose object of high 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, very young cluster (see Parameters). It is poorly studied in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Very young

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

Data

🔍 Search references for UBC 191 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	–	37.494	58.057	0.405	-0.402	-0.95	-46.842
Li et al.	2025	37.507	58.0	0.392	-0.393	-0.947	–
Almeida et al.	2025	37.485	57.962	–	–	–	–
Celli et al.	2024	37.507	58.0	–	–	–	–
Dias et al.	2021	37.485	57.962	0.369	-0.383	-0.927	–
Cantat-Gaudin et al.	2020	37.507	58.0	0.392	-0.393	-0.947	–
Castro-Ginard et al.	2020	37.491	57.976	0.387	-0.385	-0.954	–

💡 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]	Bfr	BSS
Li et al.	2025	2.19	2.05	–	21	0.053	–	–	–
Almeida et al.	2025	2.24	2.10	–	15	–	1533	–	–
Celli et al.	2024	–	–	–	18	–	678	–	–
Dias et al.	2021	2.24	2.10	–	15	-0.042	–	–	–
Cantat-Gaudin et al.	2020	2.69	1.93	–	18	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
FSR 0596	49.1	37.48	58.13	0.4	-0.48	-0.91	-51.17	0.63
OC 0252	26.3	37.65	58.1	0.39	-0.36	-1.0	–	0.06
CWWDL 4637	8.8	37.05	57.68	0.39	-0.33	-0.91	–	0.07

💡 Note: The % column shows the percentage of members that UBC 191 shares with each listed object.

Visualization

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