HSC 1860

0.30 UTI

0.51

C_N

0.09

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 52

Core radius and density 3.7 [pc], 0.5 [pc^-2]

C3 classification AB

C_N 0.51 Moderately populated
C_dens 0.09 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

ℹ️

HSC 1860 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a large distance, well below the mid-plane, affected by low extinction. It is catalogued as a metal-poor, 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 Low extinction Metal-poor Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Data

🔍 Search references for HSC 1860 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	104.278	-23.565	0.133	-0.42	2.0	72.602
Hu & Soubiran	2025	104.287	-23.576	–	–	–	–
Hunt & Reffert	2024	104.284	-23.573	0.128	-0.42	1.972	72.601
Cavallo et al.	2024	104.287	-23.576	0.13	–	–	–
Hunt & Reffert	2023	104.284	-23.573	0.128	-0.42	1.972	72.601

💡 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–	7.01	0.41	1.63	690	-0.625	254	–	–
Hu & Soubiran	2025	–	–	–	–	-0.390⁽⁵⁾	–	–	–
Hunt & Reffert	2024	7.01	0.41	1.63	690	–	254⁽¹⁾	–	–
Cavallo et al.	2024	3.60	0.62	–	1000	-0.860	–	–	–
Hunt & Reffert	2023	7.01	0.41	1.63	690	–	–	–	–

(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 2968	94.2	104.28	-23.57	0.12	-0.42	2.0	72.6	0.02

💡 Note: The % column shows the percentage of members that HSC 1860 shares with each listed object.

Visualization

ℹ️

1 2