UBC 1173

0.28 UTI

0.39

C_N

0.32

C_dens

0.5

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 39

Core radius and density 1.8 [pc], 1.6 [pc^-2]

C3 classification BB

C_N 0.39 Poorly populated
C_dens 0.32 Loose
C_C3 0.5 Intermediate quality
C_lit 0.1 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 1173 is a poorly populated, loose object of intermediate 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 rarely studied in the literature.

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

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.55 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.55 (50th percentile).

Data

🔍 Search references for UBC 1173 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–	343.314	57.014	0.255	-3.015	-1.012	-50.564
Hu & Soubiran	2025	343.346	57.013	–	–	–	–
Hunt & Reffert	2024	343.321	57.018	0.251	-2.989	-1.012	-50.568
Cavallo et al.	2024	343.346	57.013	0.255	–	–	–
Hunt & Reffert	2023	343.321	57.018	0.251	-2.989	-1.012	-50.568
Castro-Ginard et al.	2022	343.33	57.01	0.26	-3.02	-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–	3.52	1.895	0.8	448	0.045	341	–	–
Hu & Soubiran	2025	–	–	–	–	-0.200⁽⁵⁾	–	–	–
Hunt & Reffert	2024	3.52	1.93	0.80	393	–	341⁽¹⁾	–	–
Cavallo et al.	2024	3.19	1.86	–	603	0.290	–	–	–
Hunt & Reffert	2023	3.52	1.93	0.80	393	–	–	–	–
Castro-Ginard et al.	2022	4.19	1.40	–	504	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 4532	76.9	343.31	57.01	0.26	-3.02	-1.01	-50.56	0.0

💡 Note: The % column shows the percentage of members that UBC 1173 shares with each listed object.

Visualization

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