UBC 100

0.66 UTI

0.43

C_N

1.0

C_dens

1.0

C_C3

0.44

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 43

Radius (P>50% members) 7.1 [arcmin]

C_N 0.43 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.44 Poorly studied
C_dup 1.0 Unique

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

Overview

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UBC 100 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 100 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	–	281.238	-11.089	0.731	-1.095	-3.372	40.117
Li et al.	2025	281.238	-11.127	0.702	-1.111	-3.323	–
Hunt & Reffert	2024	281.338	-11.069	0.744	-1.1	-3.371	22.459
Cavallo et al.	2024	281.309	-11.091	0.745	–	–	–
Hunt & Reffert	2023	281.338	-11.069	0.744	-1.1	-3.371	22.459
Tarricq et al.	2022	281.225	-10.96	0.736	-1.091	-3.384	–
Cantat-Gaudin et al.	2020	281.238	-11.127	0.702	-1.111	-3.323	–
Castro-Ginard et al.	2020	281.262	-11.123	0.698	-1.103	-3.331	–

💡 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	1.14	1.48	–	413	-0.047	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	835*	–	–
Cavallo et al.	2024	1.37	1.29	–	316	0.770	–	–	–
Hunt & Reffert	2023	1.26	1.61	1.69	112	–	–	–	–
Tarricq et al.	2022	1.39	–	–	182	–	–	–	–
Cantat-Gaudin et al.	2020	1.43	1.38	–	158	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 14116	88.4	281.32	-11.09	0.74	-1.11	-3.39	6.73	0.28
CWWDL 14115	86.0	281.27	-11.05	0.74	-1.08	-3.38	28.47	0.12

💡 Note: The % column shows the percentage of members that UBC 100 shares with each listed object.

Visualization

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