HSC 227

0.12 UTI

0.0

C_N

0.16

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 1.6 [pc], 0.8 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.16 Very loose
C_C3 0.38 Low 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 227 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very 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 Very young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.88 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.88 (50th percentile).

Data

🔍 Search references for HSC 227 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–	276.379	-9.73	0.457	0.153	-2.048	-7.415
Hunt & Reffert	2024	276.415	-9.747	0.447	0.184	-2.029	–
Cavallo et al.	2024	276.302	-9.738	0.448	–	–	–
Hunt & Reffert	2023	276.415	-9.747	0.447	0.184	-2.029	–

💡 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–	2.03	2.6	1.36	10	-0.190	509	–	–
Hunt & Reffert	2024	2.03	2.60	1.36	10	–	509⁽¹⁾	–	–
Cavallo et al.	2024	1.93	2.86	–	19	-0.190	–	–	–
Hunt & Reffert	2023	2.03	2.60	1.36	10	–	–	–	–

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

Visualization

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