UBC 633

0.08 UTI

0.0

C_N

0.18

C_dens

0.75

C_C3

0.38

C_lit

0.24

C_dup

C3 classification AB

Number of members (P>50%) 19

Radius (P>50% members) 2.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.18 Very loose
C_C3 0.75 High quality
C_lit 0.38 Poorly studied
C_dup 0.24 Likely duplicate

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

Overview

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UBC 633 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, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Very 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 633 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	–	112.791	-15.432	0.176	-1.351	1.5	85.026
Li et al.	2025	112.824	-15.429	0.173	-1.343	1.477	–
Almeida et al.	2025	112.829	-15.434	–	–	–	–
Celli et al.	2024	112.824	-15.429	–	–	–	–
Dias et al.	2021	112.829	-15.434	0.178	-1.371	1.461	101.613
Cantat-Gaudin et al.	2020	112.824	-15.429	0.173	-1.343	1.477	–
Castro-Ginard et al.	2020	112.823	-15.442	0.173	-1.36	1.478	–

💡 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	5.79	1.60	–	534	0.241	–	–	–
Almeida et al.	2025	5.58	2.07	–	5	–	996	–	–
Celli et al.	2024	–	–	–	14	–	228	–	–
Dias et al.	2021	5.58	2.07	–	5	-0.100	–	–	–
Cantat-Gaudin et al.	2020	5.62	1.82	–	14	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
FSR 1234	76.0	112.79	-15.42	0.18	-1.32	1.54	85.03	0.51

💡 Note: The % column shows the percentage of members that UBC 633 shares with each listed object.

Visualization

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