CWNU 2018

0.22 UTI

0.0

C_N

0.22

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.4 [pc], 1.1 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 0.75 High 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 2018 is a sparse, very loose object of high 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, but with a large variance across recent sources for the absorption and age parameters (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 class: 0.98 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Data

🔍 Search references for CWNU 2018 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–	354.352	58.375	0.389	-0.007	-0.78	-44.48
Hunt & Reffert	2024	354.301	58.372	0.387	-0.058	-0.776	-43.378
Cavallo et al.	2024	354.328	58.409	0.389	–	–	–
Hunt & Reffert	2023	354.301	58.372	0.387	-0.058	-0.776	-43.378
He et al.	2023	354.371	58.375	0.393	-0.007	-0.792	–

💡 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–	2.415	2.09	0.86	152	0.290	106	–	–
Hunt & Reffert	2024	2.43	2.09	0.86	152	–	106⁽¹⁾	–	–
Cavallo et al.	2024	2.38	2.15	–	219	0.290	–	–	–
Hunt & Reffert	2023	2.43	2.09	0.86	152	–	–	–	–
He et al.	2023	2.40	0.05	–	2	–	–	–	–

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

Visualization

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