UBC 1138

0.51 UTI

0.44

C_N

0.78

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 44

Stellar density (N₅₀/rad) 3.9 [N/pc²]

C3 classification AB

C_N 0.44 Poorly populated
C_dens 0.78 Dense
C_C3 0.75 High 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 1138 is a poorly populated, dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Metal-rich Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 383 along with UBC_155.

Palma et al. (2025)
Part of multiple system G55, along with UBC_155 and CWNU_2608.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 1138 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–	320.349	50.288	0.598	-3.418	-3.416	-24.217
Hunt & Reffert	2024	320.337	50.303	0.595	-3.397	-3.432	-24.24
Cavallo et al.	2024	320.319	50.282	0.598	–	–	–
Hunt & Reffert	2023	320.337	50.303	0.595	-3.397	-3.432	-24.24
Castro-Ginard et al.	2022	320.33	50.29	0.6	-3.42	-3.41	–

💡 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–	1.815	1.5	1.95	110	0.770	197	–	–
Liu et al.	2025	2.57	0.58	–	107	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	197⁽¹⁾	–	–
Cavallo et al.	2024	1.96	1.71	–	112	0.770	–	–	–
Hunt & Reffert	2023	1.59	1.61	1.95	77	–	–	–	–
Castro-Ginard et al.	2022	1.67	1.39	–	123	–	–	–	–

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

Visualization

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