HSC 1548

0.14 UTI

0.0

C_N

0.17

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.8 [pc], 0.9 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.17 Very loose
C_C3 0.38 Low 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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HSC 1548 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large 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 was recently reported in the literature.

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Data

🔍 Search references for HSC 1548 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–	92.214	13.899	0.174	0.278	-0.511	–
Hu & Soubiran	2025	92.197	13.938	–	–	–	–
Hunt & Reffert	2024	92.21	13.897	0.176	0.212	-0.422	–
Cavallo et al.	2024	92.197	13.938	0.175	–	–	–
Hunt & Reffert	2023	92.21	13.897	0.176	0.212	-0.422	–

💡 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–	4.62	2.8	2.37	242	0.045	759	–	–
Hu & Soubiran	2025	–	–	–	–	-0.400⁽⁵⁾	–	–	–
Hunt & Reffert	2024	4.62	2.80	2.37	241	–	759⁽¹⁾	–	–
Cavallo et al.	2024	4.53	2.38	–	603	0.490	–	–	–
Hunt & Reffert	2023	4.62	2.80	2.37	242	–	–	–	–

(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 3891	80.0	92.21	13.9	0.18	0.31	-0.53	–	0.02

💡 Note: The % column shows the percentage of members that HSC 1548 shares with each listed object.

Visualization

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