HSC 457

0.12 UTI

0.0

C_N

0.05

C_dens

0.5

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 18

Core radius and density 3.0 [pc], 0.3 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.05 Very loose
C_C3 0.5 Intermediate 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

ℹ️

HSC 457 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high 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.

Distant High extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.72 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.72 (50th percentile).

Data

🔍 Search references for HSC 457 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	294.795	20.143	0.258	-2.546	-6.12	101.945
Hunt & Reffert	2024	294.817	20.173	0.262	-2.562	-6.145	101.899
Cavallo et al.	2024	294.778	20.124	0.261	–	–	–
Hunt & Reffert	2023	294.817	20.173	0.262	-2.562	-6.145	101.899

💡 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–	3.46	3.67	2.41	13	-0.200	752	–	–
Hunt & Reffert	2024	3.46	3.67	2.41	13	–	752⁽¹⁾	–	–
Cavallo et al.	2024	4.17	3.57	–	8	-0.200	–	–	–
Hunt & Reffert	2023	3.46	3.67	2.41	13	–	–	–	–

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

Visualization

ℹ️

1 2