HSC 1854

0.18 UTI

0.0

C_N

0.14

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 19

Radius (P>50% members) 6.4 [arcmin]

C_N 0.0 Sparse
C_dens 0.14 Very loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

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

Overview

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HSC 1854 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (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 Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1854 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	–	114.393	-18.087	0.361	-1.844	2.268	–
Hunt & Reffert	2024	114.388	-18.147	0.36	-1.834	2.268	–
Cavallo et al.	2024	114.377	-18.096	0.358	–	–	–
Hunt & Reffert	2023	114.388	-18.147	0.36	-1.834	2.268	–

💡 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
Hunt & Reffert	2024	–	–	–	–	–	142*	–	–
Cavallo et al.	2024	2.42	1.31	–	138	-0.260	–	–	–
Hunt & Reffert	2023	2.55	0.93	0.30	160	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3187	84.0	114.39	-18.06	0.36	-1.84	2.27	–	0.03

💡 Note: The % column shows the percentage of members that HSC 1854 shares with each listed object.

Visualization

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