HSC 583

0.16 UTI

0.0

C_N

0.03

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 4.4 [pc], 0.1 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.75 High 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

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HSC 583 is a sparse, very loose object of high C3 quality. Its parallax locates it at a very large^* distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, intermediate-age cluster (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~17.06 kpc) differs significantly from the median photometric distance (~11.51 kpc).

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.

Extremely distant High extinction Massive Intermediate age

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.59 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.59 (50th percentile).

Data

🔍 Search references for HSC 583 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–	302.766	36.15	0.059	-2.355	-3.886	-59.42
Hunt & Reffert	2024	302.776	36.153	0.06	-2.362	-3.906	–
Hunt & Reffert	2023	302.776	36.153	0.06	-2.362	-3.906	–

💡 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–	11.51	4.75	1.48	424	–	3542	–	–
Hunt & Reffert	2024	11.51	4.75	1.48	424	–	3542⁽¹⁾	–	–
Hunt & Reffert	2023	11.51	4.75	1.48	424	–	–	–	–

(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 4205	100.0	302.77	36.15	0.09	-2.35	-3.88	-58.2	0.16

💡 Note: The % column shows the percentage of members that HSC 583 shares with each listed object.

Visualization

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