HSC 585

0.23 UTI

0.38

C_N

0.21

C_dens

0.5

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 38

Core radius and density 1.6 [pc], 1.1 [pc^-2]

C3 classification BB

C_N 0.38 Poorly populated
C_dens 0.21 Very loose
C_C3 0.5 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 585 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high 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.

Relatively close High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.74 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.74 (50th percentile).

Data

🔍 Search references for HSC 585 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–	305.832	34.582	0.3	-1.266	-3.493	-1.304
Hunt & Reffert	2024	305.822	34.584	0.3	-1.296	-3.484	-7.547
Cavallo et al.	2024	305.827	34.587	0.312	–	–	–
Hunt & Reffert	2023	305.822	34.584	0.3	-1.296	-3.484	-7.547

💡 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–	2.91	4.5	2.3	156	0.490	422	–	–
Hunt & Reffert	2024	2.91	4.50	2.30	156	–	422⁽¹⁾	–	–
Cavallo et al.	2024	3.73	4.34	–	85	0.490	–	–	–
Hunt & Reffert	2023	2.91	4.50	2.30	156	–	–	–	–

(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 3052	86.8	305.85	34.59	0.31	-1.26	-3.49	-7.6	0.06

💡 Note: The % column shows the percentage of members that HSC 585 shares with each listed object.

Visualization

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