HSC 1318

0.00 UTI

0.51

C_N

1.0

C_dens

1.0

C_C3

0.25

C_lit

0.0

C_dup

N₅₀ (P>50% members) 52

Stellar density (N₅₀/rad) 26.5 [N/pc²]

C3 classification AA

C_N 0.51 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.25 Poorly studied
C_dup 0.0 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1318 is a moderately populated, very dense object of very high 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, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Very close Low extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 191 along with HSC_1340.

Palma et al. (2025)
Part of multiple system G111, along with HSC_1195, Melotte_22, Theia_7 and HSC_1340.

Cavallo et al. (2024)
Bronze sample.

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

Data

🔍 Search references for HSC 1318 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–	64.495	28.206	7.661	8.721	-25.423	15.414
Zhang et al.	2024	64.565	28.25	–	–	–	–
Cavallo et al.	2024	64.903	28.003	7.687	–	–	–
Hunt & Reffert	2023	64.565	28.25	7.691	8.663	-25.442	23.443

💡 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–	0.13	0.61	1.66	19	-0.064	–	–	–
Liu et al.	2025	0.13	0.44	–	21	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.448⁽¹⁾	–	–	–
Cavallo et al.	2024	0.14	3.22	–	19	0.320	–	–	–
Hunt & Reffert	2023	0.13	0.61	1.66	6	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 268	100.0	64.65	28.2	7.66	8.79	-25.31	14.92	0.39
Taurus	19.2	65.78	27.29	7.72	8.8	-25.91	14.81	0.38

💡 Note: The % column shows the percentage of members that HSC 1318 shares with each listed object.

Visualization

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