HSC 1258

0.26 UTI

0.31

C_N

0.12

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 31

Core radius and density 1.6 [pc], 0.6 [pc^-2]

C3 classification AB

C_N 0.31 Poorly populated
C_dens 0.12 Very loose
C_C3 0.75 High 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 1258 is a poorly populated, very loose object of high 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, 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 significant percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Data

🔍 Search references for HSC 1258 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–	66.693	43.204	0.291	-0.663	-1.28	-59.412
Zhang et al.	2024	66.71	43.221	–	–	–	–
Hunt & Reffert	2024	66.71	43.221	0.29	-0.665	-1.294	-59.457
Cavallo et al.	2024	66.672	43.191	0.291	–	–	–
Hunt & Reffert	2023	66.71	43.221	0.29	-0.665	-1.294	-59.457

💡 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–	2.91	1.64	1.29	178	0.126	169	–	–
Zhang et al.	2024	–	–	–	–	-0.109⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.91	1.64	1.29	178	–	169⁽¹⁾	–	–
Cavallo et al.	2024	3.52	1.88	–	141	0.360	–	–	–
Hunt & Reffert	2023	2.91	1.64	1.29	178	–	–	–	–

(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 3158	74.2	66.7	43.2	0.29	-0.66	-1.28	-59.41	0.02

💡 Note: The % column shows the percentage of members that HSC 1258 shares with each listed object.

Visualization

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