HSC 315

0.24 UTI

0.36

C_N

0.03

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 36

Core radius and density 2.6 [pc], 0.1 [pc^-2]

C3 classification AB

C_N 0.36 Poorly populated
C_dens 0.03 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

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HSC 315 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster (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.

Relatively close Moderate extinction Metal-poor Intermediate age

Palma et al. (2025)
Part of multiple system G233, along with UBC_113, Berkeley_80 and PHOC_38.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.25 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.25 (50th percentile).

Data

🔍 Search references for HSC 315 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–	285.036	-1.798	0.404	0.294	-1.641	7.576
Hunt & Reffert	2024	284.927	-1.809	0.403	0.285	-1.612	5.96
Cavallo et al.	2024	285.018	-1.782	0.403	–	–	–
Hunt & Reffert	2023	284.927	-1.809	0.403	0.285	-1.612	5.96

💡 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–	2.31	2.85	2.55	141	-0.500	276	–	–
Hunt & Reffert	2024	2.31	2.86	2.55	141	–	276⁽¹⁾	–	–
Cavallo et al.	2024	1.70	2.81	–	355	-0.500	–	–	–
Hunt & Reffert	2023	2.31	2.85	2.55	141	–	–	–	–

(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 3671	91.7	285.1	-1.8	0.4	0.3	-1.65	7.59	0.11

💡 Note: The % column shows the percentage of members that HSC 315 shares with each listed object.

Visualization

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