UBC 1420

0.23 UTI

0.43

C_N

0.08

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 43

Core radius and density 3.5 [pc], 0.4 [pc^-2]

C3 classification BB

C_N 0.43 Poorly populated
C_dens 0.08 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 1420 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely 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 Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P138, along with HSC_2003.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Data

🔍 Search references for UBC 1420 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–	119.6	-32.153	0.245	-2.59	2.684	68.378
Hunt & Reffert	2024	119.585	-32.152	0.252	-2.56	2.69	55.583
Cavallo et al.	2024	119.578	-32.146	0.258	–	–	–
Hunt & Reffert	2023	119.585	-32.152	0.252	-2.56	2.69	55.583
Castro-Ginard et al.	2022	119.62	-32.15	0.25	-2.58	2.66	–

💡 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–	3.38	1.3	1.99	266	-0.020	303	–	–
Hunt & Reffert	2024	3.38	1.30	1.99	251	–	303⁽¹⁾	–	–
Cavallo et al.	2024	3.28	1.59	–	282	-0.020	–	–	–
Hunt & Reffert	2023	3.38	1.30	1.99	251	–	–	–	–
Castro-Ginard et al.	2022	4.10	0.97	–	570	–	–	–	–

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

Visualization

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