HSC 1954

0.27 UTI

0.27

C_N

0.21

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification CB

Number of members (P>50%) 27

Radius (P>50% members) 2.9 [arcmin]

C_N 0.27 Poorly populated
C_dens 0.21 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 1954 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a large distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old 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.

Distant Low extinction Near-solar metallicity Old

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1954 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	–	117.991	-26.82	0.165	-1.657	2.2	91.228
Hu & Soubiran	2025	118.031	-26.81	–	–	–	–
Hunt & Reffert	2024	117.97	-26.798	0.166	-1.667	2.195	91.721
Cavallo et al.	2024	118.031	-26.81	0.168	–	–	–
Hunt & Reffert	2023	117.97	-26.798	0.166	-1.667	2.195	91.721

💡 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	–	–	–	–	-0.210*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	433*	–	–
Cavallo et al.	2024	4.13	0.55	–	1622	0.040	–	–	–
Hunt & Reffert	2023	5.45	0.92	2.18	624	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 2980	100.0	118.0	-26.82	0.17	-1.66	2.2	91.23	0.02

💡 Note: The % column shows the percentage of members that HSC 1954 shares with each listed object.

Visualization

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