UBC 423

0.57 UTI

0.32

C_N

1.0

C_dens

0.62

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 32

Stellar density (N₅₀/rad) 7.7 [N/pc²]

C3 classification AC

C_N 0.32 Poorly populated
C_dens 1.0 Very dense
C_C3 0.62 Intermediate quality
C_lit 0.45 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 423 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young 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 large percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.

Data

🔍 Search references for UBC 423 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–	48.273	58.929	0.386	0.571	-0.902	-42.543
Almeida et al.	2025	48.295	58.937	–	–	–	–
Hunt & Reffert	2024	48.271	58.929	0.391	0.538	-0.873	–
Celli et al.	2024	48.257	58.927	–	–	–	–
Cavallo et al.	2024	48.336	58.954	0.39	–	–	–
Hunt & Reffert	2023	48.271	58.929	0.391	0.538	-0.873	–
Dias et al.	2021	48.295	58.937	0.378	0.626	-0.779	–
Cantat-Gaudin et al.	2020	48.257	58.927	0.359	0.603	-0.835	–
Castro-Ginard et al.	2020	48.276	58.93	0.363	0.6	-0.823	–

💡 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–	2.52	2.62	1.36	14	0.406	207	–	–
Almeida et al.	2025	2.62	2.62	–	8	–	184	–	–
Hunt & Reffert	2024	–	–	–	–	–	452⁽¹⁾	–	–
Celli et al.	2024	–	–	–	17	–	207	–	–
Cavallo et al.	2024	2.49	2.61	–	15	0.670	–	–	–
Hunt & Reffert	2023	2.39	2.58	1.36	12	–	–	–	–
Dias et al.	2021	2.62	2.62	–	8	0.143	–	–	–
Cantat-Gaudin et al.	2020	2.52	2.64	–	17	–	–	–	–

(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 2632	84.4	48.3	58.93	0.39	0.58	-0.89	-42.54	0.03

💡 Note: The % column shows the percentage of members that UBC 423 shares with each listed object.

Visualization

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