HSC 2945

0.33 UTI

0.5

C_N

0.31

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 51

Core radius and density 2.1 [pc], 1.6 [pc^-2]

C3 classification AB

C_N 0.5 Moderately populated
C_dens 0.31 Loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2945 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, young 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.

Relatively close Moderate extinction Metal-poor Young

Palma et al. (2025)
Part of multiple system G175, along with Trumpler_28 and Antalova_1.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Data

🔍 Search references for HSC 2945 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–	265.567	-33.504	0.64	1.336	0.458	-20.46
Hunt & Reffert	2024	265.594	-33.495	0.645	1.318	0.456	1.617
Cavallo et al.	2024	265.559	-33.516	0.643	–	–	–
Hunt & Reffert	2023	265.594	-33.495	0.645	1.318	0.456	1.617

💡 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–	1.44	2.88	1.64	73	-0.760	465	–	–
Hunt & Reffert	2024	1.44	2.88	1.64	73	–	465⁽¹⁾	–	–
Cavallo et al.	2024	1.37	3.43	–	89	-0.760	–	–	–
Hunt & Reffert	2023	1.44	2.88	1.64	73	–	–	–	–

(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 3799	96.1	265.56	-33.51	0.65	1.32	0.43	-20.46	0.04

💡 Note: The % column shows the percentage of members that HSC 2945 shares with each listed object.

Visualization

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