HSC 1026

0.23 UTI

0.25

C_N

0.1

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 1.8 [pc], 0.5 [pc^-2]

C3 classification AB

C_N 0.25 Poorly populated
C_dens 0.1 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

HSC 1026 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, young 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.

⚠️ 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 Metal-rich Young

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P23, along with OC_0237.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Data

🔍 Search references for HSC 1026 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	23.763	61.721	0.352	-1.42	-0.477	–
Hunt & Reffert	2024	23.773	61.727	0.345	-1.421	-0.478	–
Cavallo et al.	2024	23.715	61.718	0.344	–	–	–
Hunt & Reffert	2023	23.773	61.727	0.345	-1.421	-0.478	–

💡 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–	2.71	2.33	1.97	47	0.540	505	–	–
Hunt & Reffert	2024	2.71	2.33	1.97	47	–	505⁽¹⁾	–	–
Cavallo et al.	2024	4.27	2.59	–	16	0.540	–	–	–
Hunt & Reffert	2023	2.71	2.33	1.97	47	–	–	–	–

(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 3525	96.0	23.69	61.71	0.35	-1.42	-0.48	–	0.05

💡 Note: The % column shows the percentage of members that HSC 1026 shares with each listed object.

Visualization

ℹ️

1 2