HSC 1021

0.36 UTI

0.28

C_N

0.19

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 28

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification AB

C_N 0.28 Poorly populated
C_dens 0.19 Very loose
C_C3 0.75 High 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 1021 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, below 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.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1021 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–	20.544	57.237	0.256	-2.117	-1.091	-62.619
Hu & Soubiran	2025	20.546	57.249	–	–	–	–
Zhang et al.	2024	20.674	57.221	–	–	–	–
Hunt & Reffert	2024	20.674	57.221	0.258	-2.08	-1.097	-55.353
Cavallo et al.	2024	20.546	57.249	0.255	–	–	–
Hunt & Reffert	2023	20.674	57.221	0.258	-2.08	-1.097	-55.353

💡 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–	3.255	1.22	1.68	543	-0.170	130	–	–
Hu & Soubiran	2025	–	–	–	–	-0.170⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.254⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	130⁽¹⁾	–	–
Cavallo et al.	2024	3.08	1.19	–	617	0.030	–	–	–
Hunt & Reffert	2023	3.43	1.25	1.68	469	–	–	–	–

(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 3279	85.7	20.44	57.25	0.25	-2.12	-1.11	-62.62	0.06

💡 Note: The % column shows the percentage of members that HSC 1021 shares with each listed object.

Visualization

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