UBC 133

0.75 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.5

C_lit

1.0

C_dup

N₅₀ (P>50% members) 122

Stellar density (N₅₀/rad) 11.3 [N/pc²]

C3 classification AA

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UBC 133 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately 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

Cavallo et al. (2024)
Gold sample.

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Data

🔍 Search references for UBC 133 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–	303.699	28.342	0.611	-1.118	-4.689	-12.414
Li et al.	2025	303.694	28.355	0.583	-1.12	-4.678	–
Almeida et al.	2025	303.723	28.364	–	–	–	–
Hunt & Reffert	2024	303.687	28.337	0.604	-1.131	-4.684	-11.312
Cavallo et al.	2024	303.707	28.354	0.611	–	–	–
Hunt & Reffert	2023	303.687	28.337	0.604	-1.131	-4.684	-11.312
Almeida et al.	2023	303.712	28.368	–	–	–	–
Dias et al.	2021	303.723	28.364	0.582	-1.119	-4.649	–
Cantat-Gaudin et al.	2020	303.694	28.355	0.583	-1.12	-4.678	–
Castro-Ginard et al.	2020	303.705	28.375	0.584	-1.115	-4.662	–

💡 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–	1.55	2.79	2.12	56	0.297	739	0.76	–
Li et al.	2025	1.05	2.63	–	655	-0.044	–	–	–
Almeida et al.	2025	1.55	2.79	–	44	–	739	–	–
Hunt & Reffert	2024	–	–	–	–	–	985⁽¹⁾	–	–
Cavallo et al.	2024	1.93	3.25	–	50	0.730	–	–	–
Hunt & Reffert	2023	1.56	3.23	2.12	56	–	–	–	–
Almeida et al.	2023	1.45	2.96	–	65	0.187	710⁽¹⁾	0.76	–
Dias et al.	2021	1.55	2.79	–	44	0.407	–	–	–
Cantat-Gaudin et al.	2020	1.59	2.34	–	85	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 3736	91.0	303.7	28.35	0.62	-1.12	-4.69	-12.41	0.02

💡 Note: The % column shows the percentage of members that UBC 133 shares with each listed object.

Visualization

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