HSC 530

0.23 UTI

0.25

C_N

0.15

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 0.8 [N/pc²]

C3 classification CC

C_N 0.25 Poorly populated
C_dens 0.15 Very loose
C_C3 0.25 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 530 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It was recently reported in the literature.

⚠️ 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 Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 530 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–	300.062	29.086	0.51	-0.93	-6.558	25.396
Hu & Soubiran	2025	300.084	29.156	–	–	–	–
Hunt & Reffert	2024	300.07	29.082	0.504	-0.931	-6.52	27.549
Cavallo et al.	2024	300.084	29.156	0.509	–	–	–
Hunt & Reffert	2023	300.07	29.082	0.504	-0.931	-6.52	27.549

💡 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–	1.88	2.055	2.18	880	-0.320	97	–	–
Hu & Soubiran	2025	–	–	–	–	-0.100⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	97⁽¹⁾	–	–
Cavallo et al.	2024	1.89	2.02	–	1445	-0.540	–	–	–
Hunt & Reffert	2023	1.87	2.09	2.18	316	–	–	–	–

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

Visualization

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