UBC 1091

0.24 UTI

0.0

C_N

0.18

C_dens

1.0

C_C3

0.0

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 24

Radius (P>50% members) 6.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.18 Very loose
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

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

Overview

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UBC 1091 is a sparse, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a young cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a significant percentage of members with 2 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 Young

Data

🔍 Search references for UBC 1091 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	–	301.607	36.374	0.339	-2.527	-5.112	–
Castro-Ginard et al.	2022	301.56	36.32	0.34	-2.53	-5.12	–

💡 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
Castro-Ginard et al.	2022	2.99	1.58	–	35	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0103	72.0	301.61	36.42	0.35	-2.54	-5.11	–	0.18
Theia 4725	68.0	301.61	36.42	0.34	-2.54	-5.1	–	0.06

💡 Note: The % column shows the percentage of members that UBC 1091 shares with each listed object.

Visualization

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