UBC 663

0.10 UTI

0.0

C_N

0.04

C_dens

0.75

C_C3

0.1

C_lit

0.52

C_dup

N_m (P>50%) 17

Core radius and density 1.8 [pc], 0.2 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.75 High quality
C_lit 0.1 Rarely studied
C_dup 0.52 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 663 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

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

Data

🔍 Search references for UBC 663 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–	182.722	-63.635	0.393	-5.713	-0.032	–
Li et al.	2025	182.773	-63.626	0.361	-5.724	-0.053	–
Almeida et al.	2025	182.746	-63.631	–	–	–	–
Dias et al.	2021	182.746	-63.631	0.38	-5.721	-0.039	–
Cantat-Gaudin et al.	2020	182.773	-63.626	0.361	-5.724	-0.053	–

💡 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–	2.6	1.35	–	12	0.129	375	–	–
Li et al.	2025	2.27	0.96	–	18	0.153	–	–	–
Almeida et al.	2025	2.72	1.35	–	7	–	375	–	–
Dias et al.	2021	2.72	1.35	–	7	0.105	–	–	–
Kounkel et al.	2020	2.48	1.52	–	26	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 517	48.0	182.52	-63.8	0.41	-5.68	0.02	–	0.39

💡 Note: The % column shows the percentage of members that UBC 663 shares with each listed object.

Visualization

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