UBC 642

0.24 UTI

0.25

C_N

0.1

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 25

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

C_N 0.25 Poorly populated
C_dens 0.1 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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UBC 642 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, well above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster (see Parameters). It is poorly studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Low extinction Near-solar metallicity Old

Data

🔍 Search references for UBC 642 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	–	130.41	-22.968	0.294	-3.047	2.853	95.21
Li et al.	2025	130.42	-22.955	0.319	-3.05	2.815	–
Dias et al.	2021	130.421	-22.984	0.3	-3.03	2.827	–
Cantat-Gaudin et al.	2020	130.42	-22.955	0.319	-3.05	2.815	–
Castro-Ginard et al.	2020	130.429	-22.98	0.316	-3.048	2.814	–

💡 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	4.12	0.45	–	2348	-0.343	–	–	–
Dias et al.	2021	3.69	0.99	–	1189	-0.334	–	–	–

Visualization

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