HSC 1005

0.11 UTI

0.26

C_N

0.15

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 26

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification DC

C_N 0.26 Poorly populated
C_dens 0.15 Very loose
C_C3 0.12 Very low 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

ℹ️

HSC 1005 is a poorly populated, very loose object of very low 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, 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 Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as hyperbolic encounter pair 180 along with Theia_872, and as hyperbolic encounter pair 400 along with XDOCC_1, and of multiple system 50 along with XDOCC_1 and Theia_872.

Palma et al. (2025)
Classified as optical pair P403, along with HSC_1004.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for HSC 1005 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	18.302	60.873	1.31	-0.88	-2.298	-5.541
Liu et al.	2025	18.42	60.97	1.29	-0.9	-2.28	-4.91
Cavallo et al.	2024	18.239	60.816	1.304	–	–	–
Hunt & Reffert	2023	18.421	60.971	1.294	-0.898	-2.282	-4.909

💡 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–	0.8	0.75	0.66	99	0.200	–	–	–
Liu et al.	2025	1.20	0.36	–	48	–	–	–	–
Cavallo et al.	2024	0.80	1.04	–	132	0.200	–	–	–
Hunt & Reffert	2023	0.75	0.75	0.66	99	–	–	–	–

Visualization

ℹ️

1 2