UBC 188

0.28 UTI

0.72

C_N

1.0

C_dens

0.75

C_C3

0.55

C_lit

0.39

C_dup

C3 classification AB

Number of members (P>50%) 93

Radius (P>50% members) 4.4 [arcmin]

C_N 0.72 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.55 Moderately studied
C_dup 0.39 Possibly duplicate

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

Overview

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UBC 188 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately 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 Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 188 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	–	27.486	53.896	0.329	-0.825	-1.593	-70.261
Almeida et al.	2025	27.464	53.922	–	–	–	–
Zhang et al.	2024	27.498	53.895	–	–	–	–
Hunt & Reffert	2024	27.498	53.895	0.337	-0.844	-1.612	-70.3
Celli et al.	2024	27.466	53.9	–	–	–	–
Cavallo et al.	2024	27.456	53.923	0.331	–	–	–
Hunt & Reffert	2023	27.498	53.895	0.337	-0.844	-1.612	-70.3
Dias et al.	2021	27.464	53.922	0.324	-0.847	-1.54	–
Cantat-Gaudin et al.	2020	27.466	53.9	0.335	-0.866	-1.557	–
Castro-Ginard et al.	2020	27.446	53.924	0.333	-0.86	-1.566	–

💡 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
Almeida et al.	2025	2.58	0.70	–	17	–	319	–	–
Zhang et al.	2024	–	–	–	–	-0.181*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	448*	–	–
Celli et al.	2024	–	–	–	26	–	363	–	–
Cavallo et al.	2024	2.22	0.73	–	21	-0.590	–	–	–
Hunt & Reffert	2023	2.61	0.59	1.85	36	–	–	–	–
Dias et al.	2021	2.58	0.70	–	17	-0.093	–	–	–
Cantat-Gaudin et al.	2020	2.87	0.33	–	26	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
SAI 15	61.3	27.49	53.9	0.34	-0.82	-1.62	-97.29	0.46
CWWDL 3307	41.9	27.49	53.89	0.34	-0.79	-1.64	-97.29	0.0

💡 Note: The % column shows the percentage of members that UBC 188 shares with each listed object.

Visualization

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