UBC 233

0.63 UTI

0.67

C_N

0.62

C_dens

0.75

C_C3

0.55

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 84

Radius (P>50% members) 7.2 [arcmin]

C_N 0.67 Moderately populated
C_dens 0.62 Moderately dense
C_C3 0.75 High quality
C_lit 0.55 Moderately studied
C_dup 1.0 Unique

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

Overview

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UBC 233 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 233 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	–	112.779	-28.381	0.402	-0.793	0.753	21.068
Li et al.	2025	112.783	-28.377	0.401	-0.833	0.72	–
Hu & Soubiran	2025	112.794	-28.365	–	–	–	–
Almeida et al.	2025	112.796	-28.377	–	–	–	–
Hunt & Reffert	2024	112.77	-28.385	0.396	-0.782	0.753	20.045
Cavallo et al.	2024	112.794	-28.365	0.397	–	–	–
Hunt & Reffert	2023	112.77	-28.385	0.396	-0.782	0.753	20.045
Dias et al.	2021	112.796	-28.377	0.381	-0.839	0.722	–
Cantat-Gaudin et al.	2020	112.783	-28.377	0.401	-0.833	0.72	–
Castro-Ginard et al.	2020	112.791	-28.37	0.394	-0.84	0.713	–

💡 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	2.26	0.51	–	518	0.140	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.140*	–	–	–
Almeida et al.	2025	2.19	0.76	–	418	–	281	–	–
Hunt & Reffert	2024	–	–	–	–	–	407*	–	–
Cavallo et al.	2024	2.26	0.50	–	603	0.440	–	–	–
Hunt & Reffert	2023	2.25	0.44	1.31	467	–	–	–	–
Dias et al.	2021	2.19	0.76	–	418	0.044	–	–	–
Cantat-Gaudin et al.	2020	2.40	0.59	–	457	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 145	41.7	112.81	-28.38	0.4	-0.82	0.76	24.03	0.0

💡 Note: The % column shows the percentage of members that UBC 233 shares with each listed object.

Visualization

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