CWNU 2580

0.18 UTI

0.44

C_N

0.08

C_dens

0.25

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 44

Core radius and density 3.6 [pc], 0.4 [pc^-2]

C3 classification DB

C_N 0.44 Poorly populated
C_dens 0.08 Very loose
C_C3 0.25 Low quality
C_lit 0.06 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 2580 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, below 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.

⚠️ 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.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.93 (50th percentile), true positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.93 (50th percentile), true positive? (human-assigned).

Data

🔍 Search references for CWNU 2580 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–	65.45	45.537	0.377	-0.046	-1.032	32.946
Hunt & Reffert	2024	65.515	45.486	0.353	-0.031	-1.022	32.971
Cavallo et al.	2024	65.405	45.583	0.358	–	–	–
Hunt & Reffert	2023	65.515	45.486	0.353	-0.031	-1.022	32.971
He et al.	2023	65.384	45.57	0.391	-0.071	-1.018	-20.36

💡 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–	2.56	3.0	2.21	136	0.200	547	–	–
Hunt & Reffert	2024	2.56	2.94	2.21	136	–	547⁽¹⁾	–	–
Cavallo et al.	2024	2.79	3.06	–	63	0.200	–	–	–
Hunt & Reffert	2023	2.56	2.94	2.21	136	–	–	–	–
He et al.	2023	2.40	3.15	–	141	–	–	–	–

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

Visualization

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