CWNU 1579

0.22 UTI

0.39

C_N

0.09

C_dens

0.38

C_C3

0.12

C_lit

1.0

C_dup

N_m (P>50%) 39

Core radius and density 3.9 [pc], 0.5 [pc^-2]

C3 classification CB

C_N 0.39 Poorly populated
C_dens 0.09 Very loose
C_C3 0.38 Low quality
C_lit 0.12 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1579 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, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

⚠️ 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 Metal-rich Young

Palma et al. (2025)
Classified as optical pair P319, along with HSC_2324.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.20 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.20 (50th percentile).

Data

🔍 Search references for CWNU 1579 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–	153.878	-57.09	0.401	-5.971	3.908	–
Hunt & Reffert	2024	153.851	-57.077	0.392	-6.0	3.906	–
Cavallo et al.	2024	154.072	-57.223	0.396	–	–	–
Hunt & Reffert	2023	153.851	-57.077	0.392	-6.0	3.906	–
He et al.	2023	153.871	-57.103	0.406	-5.967	3.906	–

💡 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–	2.32	1.54	2.4	81	0.780	192	–	–
Hunt & Reffert	2024	2.32	1.30	2.40	81	–	192⁽¹⁾	–	–
Cavallo et al.	2024	2.67	1.78	–	65	0.780	–	–	–
Hunt & Reffert	2023	2.32	1.30	2.40	81	–	–	–	–
He et al.	2023	2.24	2.95	–	282	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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