HSC 1178

0.09 UTI

0.0

C_N

0.22

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 1.1 [N/pc²]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 0.25 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 1178 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (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 High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for HSC 1178 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–	55.704	53.49	0.412	1.726	-1.859	-0.96
Hunt & Reffert	2024	55.59	53.503	0.414	1.732	-1.797	-0.979
Cavallo et al.	2024	55.667	53.488	0.411	–	–	–
Hunt & Reffert	2023	55.59	53.503	0.414	1.732	-1.797	-0.979

💡 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–	2.495	4.87	1.91	420	-0.100	308	–	–
Hunt & Reffert	2024	–	–	–	–	–	308⁽¹⁾	–	–
Cavallo et al.	2024	2.82	5.17	–	123	-0.100	–	–	–
Hunt & Reffert	2023	2.17	4.57	1.91	718	–	–	–	–

(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 3398	92.0	55.77	53.47	0.42	1.72	-1.83	-9.47	0.12

💡 Note: The % column shows the percentage of members that HSC 1178 shares with each listed object.

Visualization

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