HSC 1000

0.16 UTI

0.26

C_N

0.12

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 26

Core radius and density 1.9 [pc], 0.6 [pc^-2]

C3 classification CB

C_N 0.26 Poorly populated
C_dens 0.12 Very loose
C_C3 0.38 Low 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 1000 is a poorly populated, 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 low-mass, near-solar metallicity, young cluster (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 Moderate extinction Low mass Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P402, along with HSC_1006.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for HSC 1000 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	18.51	63.777	1.034	-1.067	-1.396	-2.089
Hunt & Reffert	2024	18.399	63.759	1.031	-0.989	-1.342	-2.085
Cavallo et al.	2024	18.635	63.782	1.04	–	–	–
Hunt & Reffert	2023	18.399	63.759	1.031	-0.989	-1.342	-2.085

💡 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–	0.93	2.62	1.37	90	0.060	47	–	–
Hunt & Reffert	2024	0.93	2.62	1.37	90	–	47⁽¹⁾	–	–
Cavallo et al.	2024	1.13	2.40	–	72	0.060	–	–	–
Hunt & Reffert	2023	0.93	2.62	1.37	90	–	–	–	–

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

Visualization

ℹ️

1 2