HSC 1387

0.20 UTI

0.0

C_N

0.16

C_dens

0.25

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 0.8 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.16 Very loose
C_C3 0.25 Low quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1387 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near 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 metallicity 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

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 112 along with CWNU_2180.

Palma et al. (2025)
Classified as optical pair P343, along with CWNU_2180.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1387 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–	81.901	29.618	0.745	-0.374	-3.318	–
Zhang et al.	2024	81.814	29.738	–	–	–	–
Hunt & Reffert	2024	81.814	29.738	0.749	-0.317	-3.347	–
Cavallo et al.	2024	81.941	29.588	0.752	–	–	–
Hunt & Reffert	2023	81.814	29.738	0.749	-0.317	-3.347	–

💡 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–	1.26	1.04	0.51	74	0.088	73	–	–
Liu et al.	2025	2.10	0.40	–	74	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.174⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	73⁽¹⁾	–	–
Cavallo et al.	2024	1.22	1.05	–	74	0.350	–	–	–
Hunt & Reffert	2023	1.26	1.04	0.51	54	–	–	–	–

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

Visualization

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