HSC 1081

0.15 UTI

0.0

C_N

0.08

C_dens

0.62

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 2.1 [pc], 0.4 [pc^-2]

C3 classification AC

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.62 Intermediate 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

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HSC 1081 is a sparse, very loose object of intermediate 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.

⚠️ 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.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.51 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.51 (50th percentile).

Data

🔍 Search references for HSC 1081 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–	32.356	58.719	0.251	-1.216	0.111	-63.176
Hunt & Reffert	2024	32.324	58.717	0.247	-1.222	0.123	-29.69
Cavallo et al.	2024	32.376	58.704	0.247	–	–	–
Hunt & Reffert	2023	32.324	58.717	0.247	-1.222	0.123	-29.69

💡 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–	3.62	1.05	1.79	643	-0.320	162	–	–
Hunt & Reffert	2024	3.62	1.05	1.79	643	–	162⁽¹⁾	–	–
Cavallo et al.	2024	3.47	1.88	–	224	-0.320	–	–	–
Hunt & Reffert	2023	3.62	1.05	1.79	643	–	–	–	–

(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 3946	76.0	32.36	58.7	0.25	-1.22	0.11	-81.57	0.03

💡 Note: The % column shows the percentage of members that HSC 1081 shares with each listed object.

Visualization

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