HSC 925

0.29 UTI

0.0

C_N

0.19

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.19 Very loose
C_C3 0.75 High quality
C_lit 0.25 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 925 is a sparse, very loose object of high 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, very young cluster, but with a large variance across recent sources for the absorption 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.

Relatively close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 178 along with HSC_915.

Palma et al. (2025)
Part of multiple system G201, along with HSC_915 and Berkeley_59.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 925 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–	354.771	68.537	0.949	-2.375	-2.917	-6.441
Hunt & Reffert	2024	354.77	68.718	0.929	-2.401	-2.945	-8.622
Cavallo et al.	2024	354.155	68.512	0.941	–	–	–
Hunt & Reffert	2023	354.77	68.718	0.929	-2.401	-2.945	-8.622

💡 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–	1.22	2.4	2.47	13	0.350	164	–	–
Liu et al.	2025	1.42	0.52	–	25	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	164⁽¹⁾	–	–
Cavallo et al.	2024	1.22	2.48	–	13	0.350	–	–	–
Hunt & Reffert	2023	1.01	2.40	2.47	13	–	–	–	–

(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 4175	100.0	354.57	68.5	0.95	-2.39	-2.94	-11.41	0.19

💡 Note: The % column shows the percentage of members that HSC 925 shares with each listed object.

Visualization

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