HSC 2599

0.24 UTI

0.3

C_N

0.27

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.6 [pc], 1.3 [pc^-2]

C3 classification BB

C_N 0.3 Poorly populated
C_dens 0.27 Loose
C_C3 0.5 Intermediate 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 2599 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by very high extinction. It is catalogued as a massive, 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 Very high extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Data

🔍 Search references for HSC 2599 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–	204.576	-63.423	0.165	-7.84	-1.664	-14.485
Hunt & Reffert	2024	204.576	-63.418	0.171	-7.839	-1.634	-14.486
Cavallo et al.	2024	204.57	-63.415	0.173	–	–	–
Hunt & Reffert	2023	204.576	-63.418	0.171	-7.839	-1.634	-14.486

💡 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–	4.85	5.05	2.71	157	0.330	2234	–	–
Hunt & Reffert	2024	4.85	5.05	2.71	157	–	2234⁽¹⁾	–	–
Cavallo et al.	2024	4.27	4.83	–	195	0.330	–	–	–
Hunt & Reffert	2023	4.85	5.05	2.71	157	–	–	–	–

(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 3998	100.0	204.58	-63.43	0.19	-7.8	-1.69	-26.39	0.28

💡 Note: The % column shows the percentage of members that HSC 2599 shares with each listed object.

Visualization

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