HSC 2234

0.18 UTI

0.0

C_N

0.15

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 24

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
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 2234 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the age parameter (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.

Close Low extinction Near-solar metallicity Old

Palma et al. (2025)
Part of multiple system G144, along with UPK_549, HSC_2233 and HSC_2232.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 2234 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–	144.735	-51.913	0.971	-9.589	6.237	-35.706
Hu & Soubiran	2025	144.859	-52.029	–	–	–	–
Hunt & Reffert	2024	144.738	-52.0	0.979	-9.587	6.2	-6.842
Cavallo et al.	2024	144.859	-52.029	0.98	–	–	–
Hunt & Reffert	2023	144.738	-52.0	0.979	-9.587	6.2	-6.842

💡 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–	0.985	0.935	0.62	1202	-0.195	76	–	–
Hu & Soubiran	2025	–	–	–	–	-0.130⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	76⁽¹⁾	–	–
Cavallo et al.	2024	1.00	1.13	–	2344	-0.260	–	–	–
Hunt & Reffert	2023	0.97	0.74	0.62	60	–	–	–	–

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

Visualization

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