HSC 2582

0.19 UTI

0.0

C_N

0.22

C_dens

0.75

C_C3

0.0

C_lit

0.96

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.1 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.96 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2582 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as an intermediate-age cluster (see Parameters). It was recently reported in the literature.

Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.96) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Intermediate age

Palma et al. (2025)
Part of multiple system G22, along with HSC_2602 and Collinder_272.

Data

🔍 Search references for HSC 2582 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–	200.782	-61.163	0.45	-3.659	-1.732	–
Hunt & Reffert	2024	200.757	-61.156	0.451	-3.657	-1.734	–
Hunt & Reffert	2023	200.757	-61.156	0.451	-3.657	-1.734	–

💡 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–	2.15	0.85	0.46	149	–	141	–	–
Hunt & Reffert	2024	–	–	–	–	–	141⁽¹⁾	–	–
Hunt & Reffert	2023	2.15	0.85	0.46	149	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 292	4.0	200.17	-61.31	0.43	-3.65	-1.65	–	0.45

💡 Note: The % column shows the percentage of members that HSC 2582 shares with each listed object.

Visualization

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