HSC 1057

0.30 UTI

0.52

C_N

0.21

C_dens

0.62

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 54

Core radius and density 2.3 [pc], 1.1 [pc^-2]

C3 classification AC

C_N 0.52 Moderately populated
C_dens 0.21 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.06 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 1057 is a moderately populated, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, above 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 metallicity parameter (see Parameters). It was recently reported in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Very distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.14 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.14 (50th percentile).

Data

🔍 Search references for HSC 1057 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–	30.722	64.42	0.152	-0.748	-0.018	-63.033
Hu & Soubiran	2025	30.774	64.437	–	–	–	–
Hunt & Reffert	2024	30.72	64.42	0.141	-0.764	-0.009	-63.334
Cavallo et al.	2024	30.774	64.437	0.148	–	–	–
Hunt & Reffert	2023	30.72	64.42	0.141	-0.764	-0.009	-63.334

💡 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–	5.45	2.23	1.49	329	-0.480	746	–	–
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Hunt & Reffert	2024	5.45	2.23	1.49	329	–	746⁽¹⁾	–	–
Cavallo et al.	2024	3.96	2.33	–	661	-0.800	–	–	–
Hunt & Reffert	2023	5.45	2.23	1.49	329	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3163	98.1	30.73	64.42	0.15	-0.74	-0.04	-63.03	0.09

💡 Note: The % column shows the percentage of members that HSC 1057 shares with each listed object.

Visualization

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