HSC 1389

0.17 UTI

0.26

C_N

0.25

C_dens

0.12

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 26

Core radius and density 1.5 [pc], 1.2 [pc^-2]

C3 classification DC

C_N 0.26 Poorly populated
C_dens 0.25 Loose
C_C3 0.12 Very low quality
C_lit 0.1 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

HSC 1389 is a poorly populated, loose object of very low 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, old 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.

⚠️ 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 Moderate extinction Near-solar metallicity Old

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.12 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.12 (50th percentile).

Data

🔍 Search references for HSC 1389 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	82.414	30.04	0.219	0.878	0.566	-4.002
Hu & Soubiran	2025	82.418	30.054	–	–	–	–
Zhang et al.	2024	82.41	30.038	–	–	–	–
Hunt & Reffert	2024	82.41	30.038	0.233	0.896	0.609	-3.996
Cavallo et al.	2024	82.418	30.054	0.234	–	–	–
Hunt & Reffert	2023	82.41	30.038	0.233	0.896	0.609	-3.996

💡 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–	4.09	2.18	1.65	1312	-0.160	467	–	–
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.448⁽¹⁾	–	–	–
Hunt & Reffert	2024	4.09	2.18	1.65	1312	–	467⁽¹⁾	–	–
Cavallo et al.	2024	2.87	1.97	–	2089	0.220	–	–	–
Hunt & Reffert	2023	4.09	2.19	1.65	1312	–	–	–	–

(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 3491	92.3	82.41	30.04	0.23	0.89	0.55	-4.0	0.02

💡 Note: The % column shows the percentage of members that HSC 1389 shares with each listed object.

Visualization

ℹ️

1 2