HSC 2662

0.10 UTI

0.0

C_N

0.14

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.14 Very loose
C_C3 0.38 Low quality
C_lit 0.0 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 2662 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low 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.

Very close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 238 along with HSC_2603, and of multiple system 69 along with HSC_2603 and HSC_2615.

Palma et al. (2025)
Classified as optical pair P481, along with HSC_2641.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for HSC 2662 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–	225.6	-67.615	3.674	-12.841	-13.636	-3.276
Liu et al.	2025	230.81	-66.44	3.69	-12.87	-13.61	-0.45
Cavallo et al.	2024	228.071	-67.124	3.69	–	–	–
Hunt & Reffert	2023	230.814	-66.437	3.69	-12.873	-13.61	-0.455

💡 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–	0.28	0.13	0.45	58	-0.390	–	–	–
Liu et al.	2025	0.31	0.13	–	58	–	–	–	–
Cavallo et al.	2024	0.28	0.48	–	9	-0.390	–	–	–
Hunt & Reffert	2023	0.27	0.03	0.45	98	–	–	–	–

Visualization

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