UBC 641

0.31 UTI

0.0

C_N

0.09

C_dens

0.75

C_C3

0.35

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 0.5 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.09 Very loose
C_C3 0.75 High quality
C_lit 0.35 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 641 is a sparse, very loose object of high 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, very young cluster (see Parameters). It is poorly studied in the literature.

Distant Moderate extinction Near-solar metallicity Very young

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

Data

🔍 Search references for UBC 641 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–	116.015	-31.13	0.268	-2.296	3.252	–
Li et al.	2025	116.01	-31.135	0.248	-2.331	3.232	–
Almeida et al.	2025	115.997	-31.095	–	–	–	–
Almeida et al.	2023	115.998	-31.083	–	–	–	–
Dias et al.	2021	115.997	-31.095	0.245	-2.298	3.218	–
Cantat-Gaudin et al.	2020	116.01	-31.135	0.248	-2.331	3.232	–
Castro-Ginard et al.	2020	116.006	-31.114	0.249	-2.311	3.23	–

💡 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–	3.74	1.21	–	17	-0.002	525	0.65	–
Li et al.	2025	3.58	1.15	–	44	0.042	–	–	–
Almeida et al.	2025	3.90	1.21	–	10	–	389	–	–
Almeida et al.	2023	3.21	1.26	–	24	-0.124	661⁽¹⁾	0.65	–
Dias et al.	2021	3.90	1.21	–	10	-0.002	–	–	–

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

Visualization

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