HSC 2602

0.23 UTI

0.38

C_N

0.21

C_dens

0.5

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 38

Core radius and density 1.2 [pc], 1.1 [pc^-2]

C3 classification BB

C_N 0.38 Poorly populated
C_dens 0.21 Very loose
C_C3 0.5 Intermediate 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

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HSC 2602 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

⚠️ 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.

Relatively close Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Part of multiple system G22, along with HSC_2582 and Collinder_272.

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 2602 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–	204.165	-61.358	0.431	-3.325	-1.759	-24.329
Hunt & Reffert	2024	204.175	-61.356	0.433	-3.311	-1.712	-24.336
Cavallo et al.	2024	204.08	-61.348	0.437	–	–	–
Hunt & Reffert	2023	204.175	-61.356	0.433	-3.311	-1.712	-24.336

💡 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–	2.11	1.43	1.41	80	0.180	256	–	–
Hunt & Reffert	2024	2.11	1.43	1.41	80	–	256⁽¹⁾	–	–
Cavallo et al.	2024	2.01	1.27	–	282	0.180	–	–	–
Hunt & Reffert	2023	2.11	1.43	1.41	80	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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