UBC 228

0.42 UTI

0.34

C_N

0.48

C_dens

0.5

C_C3

0.4

C_lit

1.0

C_dup

N₅₀ (P>50% members) 34

Stellar density (N₅₀/rad) 2.4 [N/pc²]

C3 classification BB

C_N 0.34 Poorly populated
C_dens 0.48 Loose
C_C3 0.5 Intermediate quality
C_lit 0.4 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 228 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above 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 poorly studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 228 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–	118.374	-22.397	0.332	-2.259	2.127	47.22
Li et al.	2025	118.378	-22.392	0.307	-2.26	2.115	–
Hu & Soubiran	2025	118.372	-22.395	–	–	–	–
Hunt & Reffert	2024	118.382	-22.404	0.321	-2.254	2.127	47.39
Cavallo et al.	2024	118.372	-22.395	0.326	–	–	–
Hunt & Reffert	2023	118.382	-22.404	0.321	-2.254	2.127	47.39
Cantat-Gaudin et al.	2020	118.378	-22.392	0.307	-2.26	2.115	–
Castro-Ginard et al.	2020	118.38	-22.398	0.31	-2.254	2.114	–

💡 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–	2.81	0.585	0.24	782	-0.160	181	–	–
Li et al.	2025	3.68	0.94	–	752	-0.244	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	181⁽¹⁾	–	–
Cavallo et al.	2024	2.67	0.65	–	724	0.240	–	–	–
Hunt & Reffert	2023	2.72	0.29	0.24	885	–	–	–	–
Cantat-Gaudin et al.	2020	2.90	0.52	–	813	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0415	55.9	118.37	-22.4	0.32	-2.24	2.09	47.06	0.04

💡 Note: The % column shows the percentage of members that UBC 228 shares with each listed object.

Visualization

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