HSC 1794

0.23 UTI

0.0

C_N

0.13

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.13 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.25 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 1794 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large^* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~10.27 kpc) differs significantly from the median photometric distance (~7.44 kpc).

Note: This object shares a significant 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.

Very distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1794 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–	105.306	-15.163	0.097	-0.262	1.279	–
Hu & Soubiran	2025	105.299	-15.147	–	–	–	–
Hunt & Reffert	2024	105.315	-15.16	0.096	-0.288	1.254	–
Cavallo et al.	2024	105.299	-15.147	0.093	–	–	–
Hunt & Reffert	2023	105.315	-15.16	0.096	-0.288	1.254	–

💡 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–	7.44	1.665	1.8	788	-0.015	949	–	–
Hu & Soubiran	2025	–	–	–	–	-0.350⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	949⁽¹⁾	–	–
Cavallo et al.	2024	4.61	1.07	–	1413	0.320	–	–	–
Hunt & Reffert	2023	10.27	2.26	1.80	163	–	–	–	–

(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 3450	60.0	105.3	-15.15	0.1	-0.28	1.28	63.44	0.03

💡 Note: The % column shows the percentage of members that HSC 1794 shares with each listed object.

Visualization

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