HSC 854

0.33 UTI

0.25

C_N

0.28

C_dens

0.5

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 1.4 [N/pc²]

C3 classification BB

C_N 0.25 Poorly populated
C_dens 0.28 Loose
C_C3 0.5 Intermediate 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 854 is a poorly populated, loose object of intermediate 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, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G196, along with HSC_890, Theia_2526 and HSC_844.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 854 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–	346.79	56.862	0.895	-1.498	-1.582	-4.063
Hu & Soubiran	2025	346.758	56.849	–	–	–	–
Zhang et al.	2024	346.831	56.827	–	–	–	–
Hunt & Reffert	2024	346.831	56.827	0.884	-1.51	-1.585	1.739
Cavallo et al.	2024	346.758	56.849	0.889	–	–	–
Hunt & Reffert	2023	346.831	56.827	0.884	-1.51	-1.585	1.739

💡 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–	1.08	1.565	1.24	774	-0.060	162	–	–
Hu & Soubiran	2025	–	–	–	–	-0.010⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.133⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	162⁽¹⁾	–	–
Cavallo et al.	2024	1.08	1.56	–	1288	-0.060	–	–	–
Hunt & Reffert	2023	1.08	1.57	1.24	261	–	–	–	–

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

Visualization

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