UBC 105

0.47 UTI

0.75

C_N

0.54

C_dens

0.75

C_C3

0.16

C_lit

1.0

C_dup

N_m (P>50%) 112

Core radius and density 2.1 [pc], 2.7 [pc^-2]

C3 classification AB

C_N 0.75 Rich
C_dens 0.54 Moderately dense
C_C3 0.75 High quality
C_lit 0.16 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 105 is a rich, moderately dense 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 massive, near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is rarely studied in the literature.

Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for UBC 105 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–	280.324	-5.425	0.473	0.483	-1.019	-4.57
Li et al.	2025	280.319	-5.427	0.467	0.459	-0.997	–
Hunt & Reffert	2024	280.325	-5.425	0.466	0.492	-1.042	-5.142
Cavallo et al.	2024	280.335	-5.426	0.469	–	–	–
Hunt & Reffert	2023	280.325	-5.425	0.466	0.492	-1.042	-5.142
Cantat-Gaudin et al.	2020	280.319	-5.427	0.467	0.459	-0.997	–
Castro-Ginard et al.	2020	280.328	-5.434	0.468	0.457	-0.99	–

💡 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–	1.8	2.46	1.83	72	-0.267	1114	–	–
Li et al.	2025	1.50	2.23	–	195	-0.024	–	–	–
Hunt & Reffert	2024	1.92	2.59	1.83	61	–	1114⁽¹⁾	–	–
Cavallo et al.	2024	1.68	3.25	–	30	-0.510	–	–	–
Hunt & Reffert	2023	1.92	2.59	1.83	61	–	–	–	–
Cantat-Gaudin et al.	2020	2.15	1.98	–	83	–	–	–	–
Kounkel et al.	2020	1.62	2.33	–	170	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0047	33.0	280.32	-5.43	0.48	0.5	-1.01	-4.91	0.0

💡 Note: The % column shows the percentage of members that UBC 105 shares with each listed object.

Visualization

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