HSC 924

0.15 UTI

0.0

C_N

0.24

C_dens

0.5

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.2 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.24 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.0 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 924 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low 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.

⚠️ 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.

Close Low extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P532, along with HSC_932.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for HSC 924 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–	0.511	58.469	1.332	-4.2	-2.269	-9.039
Zhang et al.	2024	0.286	58.617	–	–	–	–
Cavallo et al.	2024	1.288	58.576	1.333	–	–	–
Hunt & Reffert	2023	0.286	58.617	1.33	-4.172	-2.267	-10.493

💡 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–	0.695	0.82	0.89	263	0.091	–	–	–
Zhang et al.	2024	–	–	–	–	-0.128⁽¹⁾	–	–	–
Cavallo et al.	2024	0.67	0.58	–	380	0.310	–	–	–
Hunt & Reffert	2023	0.72	1.06	0.89	146	–	–	–	–

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

Visualization

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