UBC 1554

0.35 UTI

0.52

C_N

0.36

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 53

Core radius and density 2.0 [pc], 1.8 [pc^-2]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 0.36 Loose
C_C3 0.75 High quality
C_lit 0.06 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 1554 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster (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.

Relatively close Moderate extinction Metal-poor Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Data

🔍 Search references for UBC 1554 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–	249.653	-45.677	0.518	1.036	-0.559	-16.052
Hunt & Reffert	2024	249.665	-45.664	0.526	1.033	-0.557	-16.055
Cavallo et al.	2024	249.665	-45.69	0.521	–	–	–
Hunt & Reffert	2023	249.665	-45.664	0.526	1.033	-0.557	-16.055
Castro-Ginard et al.	2022	249.66	-45.69	0.51	1.04	-0.57	-21.39

💡 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–	1.805	1.5	1.51	132	-0.760	360	–	–
Hunt & Reffert	2024	1.81	1.50	1.51	130	–	360⁽¹⁾	–	–
Cavallo et al.	2024	1.71	1.96	–	148	-0.760	–	–	–
Hunt & Reffert	2023	1.80	1.50	1.51	130	–	–	–	–
Castro-Ginard et al.	2022	2.03	1.19	–	135	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 244	100.0	249.66	-45.68	0.52	1.03	-0.56	-16.05	0.09

💡 Note: The % column shows the percentage of members that UBC 1554 shares with each listed object.

Visualization

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