UBC 1128

0.38 UTI

0.35

C_N

0.54

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 35

Stellar density (N₅₀/rad) 2.7 [N/pc²]

C3 classification BB

C_N 0.35 Poorly populated
C_dens 0.54 Moderately dense
C_C3 0.5 Intermediate quality
C_lit 0.25 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 1128 is a poorly populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P521, along with HSC_700.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 1128 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–	310.571	50.665	0.524	-1.977	-2.723	-11.896
Hunt & Reffert	2024	310.634	50.678	0.518	-1.988	-2.749	-11.911
Cavallo et al.	2024	310.573	50.659	0.517	–	–	–
Hunt & Reffert	2023	310.634	50.678	0.518	-1.988	-2.749	-11.911
Castro-Ginard et al.	2022	310.58	50.66	0.52	-1.97	-2.74	–

💡 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–	1.85	1.74	0.88	64	0.440	195	–	–
Hunt & Reffert	2024	–	–	–	–	–	195⁽¹⁾	–	–
Cavallo et al.	2024	1.85	1.75	–	123	0.440	–	–	–
Hunt & Reffert	2023	1.82	1.74	0.88	59	–	–	–	–
Castro-Ginard et al.	2022	2.04	1.63	–	64	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 422	77.1	310.59	50.67	0.52	-1.97	-2.75	–	0.0

💡 Note: The % column shows the percentage of members that UBC 1128 shares with each listed object.

Visualization

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