HSC 2184

0.18 UTI

0.26

C_N

0.13

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 26

Core radius and density 1.7 [pc], 0.7 [pc^-2]

C3 classification CB

C_N 0.26 Poorly populated
C_dens 0.13 Very loose
C_C3 0.38 Low 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 2184 is a poorly populated, very loose object of low 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 (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.

Very distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.34 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.34 (50th percentile).

Data

🔍 Search references for HSC 2184 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	140.169	-45.995	0.156	-4.534	3.41	–
Hu & Soubiran	2025	140.182	-45.988	–	–	–	–
Hunt & Reffert	2024	140.162	-45.998	0.161	-4.511	3.399	–
Cavallo et al.	2024	140.182	-45.988	0.17	–	–	–
Hunt & Reffert	2023	140.162	-45.998	0.161	-4.511	3.399	–

💡 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–	5.24	2.53	1.67	794	-0.020	483	–	–
Hu & Soubiran	2025	–	–	–	–	-0.100⁽⁵⁾	–	–	–
Hunt & Reffert	2024	5.24	2.53	1.67	794	–	483⁽¹⁾	–	–
Cavallo et al.	2024	4.23	2.48	–	813	0.060	–	–	–
Hunt & Reffert	2023	5.24	2.53	1.67	794	–	–	–	–

(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 3209	88.5	140.17	-45.99	0.16	-4.54	3.41	–	0.01

💡 Note: The % column shows the percentage of members that HSC 2184 shares with each listed object.

Visualization

ℹ️

1 2