HSC 1552

0.16 UTI

0.35

C_N

0.07

C_dens

0.25

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 35

Core radius and density 2.9 [pc], 0.3 [pc^-2]

C3 classification CC

C_N 0.35 Poorly populated
C_dens 0.07 Very loose
C_C3 0.25 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 1552 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (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)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.69 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.69 (50th percentile).

Data

🔍 Search references for HSC 1552 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–	99.128	17.172	0.213	0.052	-0.551	32.142
Zhang et al.	2024	99.142	17.165	–	–	–	–
Hunt & Reffert	2024	99.142	17.165	0.217	0.001	-0.511	52.693
Cavallo et al.	2024	99.148	17.119	0.218	–	–	–
Hunt & Reffert	2023	99.142	17.165	0.217	0.001	-0.511	52.693

💡 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–	3.91	1.12	2.28	237	0.043	282	–	–
Zhang et al.	2024	–	–	–	–	-0.084⁽¹⁾	–	–	–
Hunt & Reffert	2024	3.91	1.12	2.28	237	–	282⁽¹⁾	–	–
Cavallo et al.	2024	3.91	1.00	–	355	0.170	–	–	–
Hunt & Reffert	2023	3.91	1.12	2.28	237	–	–	–	–

(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 3130	82.9	99.06	17.16	0.19	0.1	-0.63	32.14	0.09

💡 Note: The % column shows the percentage of members that HSC 1552 shares with each listed object.

Visualization

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