UBC 578

0.22 UTI

0.0

C_N

0.08

C_dens

0.75

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 17

Core radius and density 2.2 [pc], 0.4 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.75 High quality
C_lit 0.13 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 578 is a sparse, very loose object of high C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young 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 Young

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

Data

🔍 Search references for UBC 578 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–	301.593	33.015	0.197	-2.69	-4.967	–
Almeida et al.	2025	301.596	33.02	–	–	–	–
Celli et al.	2024	301.607	33.015	–	–	–	–
Dias et al.	2021	301.596	33.02	0.192	-2.691	-4.976	–
Cantat-Gaudin et al.	2020	301.607	33.015	0.182	-2.708	-4.951	–
Castro-Ginard et al.	2020	301.61	33.024	0.181	-2.695	-4.949	–

💡 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–	4.795	2.66	–	22	-0.100	378	–	–
Almeida et al.	2025	5.20	2.70	–	5	–	483	–	–
Celli et al.	2024	–	–	–	22	–	273	–	–
Dias et al.	2021	5.20	2.70	–	5	-0.100	–	–	–
Cantat-Gaudin et al.	2020	4.39	2.53	–	22	–	–	–	–
Kounkel et al.	2020	4.20	2.62	–	45	–	–	–	–

Visualization

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