HSC 2002

0.20 UTI

0.0

C_N

0.17

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 2.2 [pc], 0.8 [pc^-2]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.17 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

HSC 2002 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age 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 Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 2002 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	122.142	-30.805	0.223	-1.727	3.451	–
Hunt & Reffert	2024	122.146	-30.815	0.214	-1.728	3.449	–
Cavallo et al.	2024	122.129	-30.801	0.213	–	–	–
Hunt & Reffert	2023	122.146	-30.815	0.214	-1.728	3.449	–

💡 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–	4.17	0.87	1.12	501	0.230	140	–	–
Hunt & Reffert	2024	4.17	0.87	1.12	501	–	140⁽¹⁾	–	–
Cavallo et al.	2024	4.19	0.89	–	105	0.230	–	–	–
Hunt & Reffert	2023	4.17	0.87	1.12	501	–	–	–	–

(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 3056	92.0	122.15	-30.8	0.22	-1.73	3.45	–	0.03

💡 Note: The % column shows the percentage of members that HSC 2002 shares with each listed object.

Visualization

ℹ️

1 2