HSC 1859

0.18 UTI

0.25

C_N

0.16

C_dens

0.5

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 0.8 [N/pc²]

C3 classification BB

C_N 0.25 Poorly populated
C_dens 0.16 Very loose
C_C3 0.5 Intermediate 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 1859 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 moderate extinction. It is catalogued as a near-solar metallicity, young cluster (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 Young

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1859 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–	110.229	-20.781	0.344	-2.288	3.188	–
Hunt & Reffert	2024	110.237	-20.775	0.337	-2.321	3.188	–
Cavallo et al.	2024	110.249	-20.749	0.337	–	–	–
Hunt & Reffert	2023	110.237	-20.775	0.337	-2.321	3.188	–

💡 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–	2.84	1.305	0.43	32	-0.150	152	–	–
Hunt & Reffert	2024	–	–	–	–	–	152⁽¹⁾	–	–
Cavallo et al.	2024	3.01	1.23	–	12	-0.150	–	–	–
Hunt & Reffert	2023	2.67	1.38	0.43	53	–	–	–	–

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

Visualization

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