UBC 318

0.09 UTI

0.0

C_N

0.07

C_dens

1.0

C_C3

0.0

C_lit

0.44

C_dup

C3 classification AA

Number of members (P>50%) 21

Radius (P>50% members) 9.5 [arcmin]

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.44 Possibly duplicate

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

Overview

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UBC 318 is a sparse, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, very young cluster (see Parameters). It is rarely studied in the literature.

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

Relatively close Moderate extinction Massive Very young

Data

🔍 Search references for UBC 318 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	–	251.118	-47.582	0.345	-0.945	-2.225	-43.355
Celli et al.	2024	251.144	-47.577	–	–	–	–
Cantat-Gaudin et al.	2020	251.144	-47.577	0.329	-0.928	-2.223	–
Castro-Ginard et al.	2020	251.178	-47.587	0.33	-0.923	-2.214	–

💡 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
Celli et al.	2024	–	–	–	11	–	1944	–	–
Cantat-Gaudin et al.	2020	2.79	1.83	–	11	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Collinder 311	56.0	251.02	-47.47	0.35	-0.97	-2.29	-43.36	0.92
Hogg 21	40.0	251.41	-47.74	0.37	-0.97	-2.17	-43.91	0.95

💡 Note: The % column shows the percentage of members that UBC 318 shares with each listed object.

Visualization

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