UBC 172

0.70 UTI

0.54

C_N

1.0

C_dens

0.75

C_C3

0.6

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 58

Radius (P>50% members) 3.9 [arcmin]

C_N 0.54 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.6 Moderately studied
C_dup 1.0 Unique

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

Overview

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UBC 172 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 moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 172 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	–	343.41	54.331	0.385	-1.597	-1.451	-38.565
Li et al.	2025	343.401	54.336	0.378	-1.632	-1.415	–
Almeida et al.	2025	343.407	54.322	–	–	–	–
Zhang et al.	2024	343.419	54.338	–	–	–	–
Hunt & Reffert	2024	343.419	54.338	0.388	-1.593	-1.455	-38.012
Cavallo et al.	2024	343.428	54.321	0.394	–	–	–
Hunt & Reffert	2023	343.419	54.338	0.388	-1.593	-1.455	-38.012
Almeida et al.	2023	343.395	54.329	–	–	–	–
Dias et al.	2021	343.407	54.322	0.368	-1.648	-1.408	–
Cantat-Gaudin et al.	2020	343.401	54.336	0.378	-1.632	-1.415	–
Castro-Ginard et al.	2020	343.392	54.328	0.373	-1.644	-1.409	–

💡 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	1.98	0.76	–	523	-0.058	–	–	–
Almeida et al.	2025	2.31	1.08	–	232	–	553	–	–
Zhang et al.	2024	–	–	–	–	-0.254*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	524*	–	–
Cavallo et al.	2024	2.43	1.22	–	178	0.170	–	–	–
Hunt & Reffert	2023	2.39	0.83	0.84	293	–	–	–	–
Almeida et al.	2023	2.46	1.23	–	224	-0.073	982*	0.58	–
Dias et al.	2021	2.31	1.08	–	232	0.135	–	–	–
Cantat-Gaudin et al.	2020	2.47	0.78	–	204	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 228	94.8	343.4	54.32	0.38	-1.59	-1.45	-38.01	0.14

💡 Note: The % column shows the percentage of members that UBC 172 shares with each listed object.

Visualization

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