HSC 1022

0.19 UTI

0.0

C_N

0.11

C_dens

0.25

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Stellar density (N₅₀/rad) 0.6 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.11 Very loose
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 1022 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.

Close Moderate extinction Near-solar metallicity Old

Palma et al. (2025)
Classified as optical pair P404, along with Theia_200.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1022 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–	21.534	59.753	1.147	-1.004	-3.053	-40.009
Hu & Soubiran	2025	21.191	59.875	–	–	–	–
Zhang et al.	2024	21.478	59.734	–	–	–	–
Hunt & Reffert	2024	21.478	59.734	1.154	-0.988	-3.014	-14.31
Cavallo et al.	2024	21.191	59.875	1.149	–	–	–
Hunt & Reffert	2023	21.478	59.734	1.154	-0.988	-3.014	-14.31

💡 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–	0.86	1.15	0.54	1445	-0.290	52	–	–
Hu & Soubiran	2025	–	–	–	–	-0.290⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	0.058⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	52⁽¹⁾	–	–
Cavallo et al.	2024	0.87	1.53	–	2138	-0.570	–	–	–
Hunt & Reffert	2023	0.85	0.77	0.54	752	–	–	–	–

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

Visualization

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