HSC 849

0.12 UTI

0.3

C_N

0.12

C_dens

0.25

C_C3

0.0

C_lit

0.9

C_dup

N₅₀ (P>50% members) 30

Stellar density (N₅₀/rad) 0.6 [N/pc²]

C3 classification DB

C_N 0.3 Poorly populated
C_dens 0.12 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 0.9 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 849 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, young cluster (see Parameters). It was recently reported in the literature.

Note: This is very likely a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.9) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Metal-rich Young

Palma et al. (2025)
Classified as optical pair P58, along with King_10.

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for HSC 849 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–	344.201	58.788	0.255	-3.395	-2.129	–
Hunt & Reffert	2024	344.215	58.78	0.263	-3.397	-2.153	–
Cavallo et al.	2024	344.251	58.743	0.26	–	–	–
Hunt & Reffert	2023	344.215	58.78	0.263	-3.397	-2.153	–

💡 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–	3.51	2.45	2.51	80	0.770	326	–	–
Hunt & Reffert	2024	–	–	–	–	–	326⁽¹⁾	–	–
Cavallo et al.	2024	3.73	2.47	–	102	0.770	–	–	–
Hunt & Reffert	2023	3.29	2.43	2.51	59	–	–	–	–

(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 2155	10.0	344.08	58.56	0.3	-3.51	-2.29	–	0.08

💡 Note: The % column shows the percentage of members that HSC 849 shares with each listed object.

Visualization

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