HSC 841

0.18 UTI

0.0

C_N

0.04

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 16

Radius (P>50% members) 2.7 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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HSC 841 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very large^* distance, well above 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 metallicity parameter (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~11.26 kpc) differs significantly from the median photometric distance (~8.32 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 High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 841 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	–	336.021	64.544	0.089	-1.977	-1.045	-101.778
Hu & Soubiran	2025	335.906	64.526	–	–	–	–
Hunt & Reffert	2024	335.954	64.548	0.091	-1.983	-1.006	-117.058
Cavallo et al.	2024	335.906	64.526	0.099	–	–	–
Hunt & Reffert	2023	335.954	64.548	0.091	-1.983	-1.006	-117.058

💡 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]	Bfr	BSS
Hu & Soubiran	2025	–	–	–	–	-0.250*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	489*	–	–
Cavallo et al.	2024	8.83	3.04	–	661	0.710	–	–	–
Hunt & Reffert	2023	7.81	3.06	2.21	787	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3499	56.0	336.09	64.54	0.09	-2.01	-1.06	-101.78	0.06

💡 Note: The % column shows the percentage of members that HSC 841 shares with each listed object.

Visualization

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