HSC 1381

0.08 UTI

0.0

C_N

0.01

C_dens

0.25

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 7.7 [pc], 0.06 [pc^-2]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.25 Low quality
C_lit 0.06 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 1381 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above 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 significant 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: 0.70 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.70 (50th percentile).

Data

🔍 Search references for HSC 1381 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–	86.046	32.608	0.237	-0.111	-0.805	–
Hunt & Reffert	2024	86.007	32.641	0.245	-0.103	-0.775	–
Cavallo et al.	2024	86.083	32.569	0.242	–	–	–
Hunt & Reffert	2023	86.007	32.641	0.245	-0.103	-0.775	–

💡 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–	3.73	1.77	2.05	122	0.220	113	–	–
Hunt & Reffert	2024	3.73	1.77	2.05	122	–	113⁽¹⁾	–	–
Cavallo et al.	2024	5.27	2.54	–	32	0.220	–	–	–
Hunt & Reffert	2023	3.73	1.77	2.05	122	–	–	–	–

(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 3583	68.0	86.23	32.58	0.23	-0.08	-0.81	–	0.03

💡 Note: The % column shows the percentage of members that HSC 1381 shares with each listed object.

Visualization

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