HSC 658

0.29 UTI

0.0

C_N

0.61

C_dens

0.25

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 24

Stellar density (N₅₀/rad) 3.1 [N/pc²]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.61 Moderately dense
C_C3 0.25 Low quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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HSC 658 is a sparse, moderately dense object of low C3 quality. Its parallax locates it at a relatively close 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.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 74 along with CWNU_460.

Palma et al. (2025)
Classified as optical pair P375, along with CWNU_460.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 658 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–	310.155	45.134	0.894	-0.669	-1.34	-45.167
Zhang et al.	2024	310.215	45.153	–	–	–	–
Hunt & Reffert	2024	310.215	45.153	0.91	-0.69	-1.406	-47.506
Cavallo et al.	2024	310.157	45.127	0.904	–	–	–
Hunt & Reffert	2023	310.215	45.153	0.91	-0.69	-1.406	-47.506

💡 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–	1.17	2.11	1.22	251	0.004	104	–	–
Liu et al.	2025	3.24	0.81	–	123	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.091⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	104⁽¹⁾	–	–
Cavallo et al.	2024	1.17	2.16	–	324	0.100	–	–	–
Hunt & Reffert	2023	1.07	2.11	1.22	251	–	–	–	–

(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 3038	92.0	310.15	45.14	0.89	-0.67	-1.36	-45.17	0.05

💡 Note: The % column shows the percentage of members that HSC 658 shares with each listed object.

Visualization

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